Patent Grant
9017623
The present invention relates generally to microfluidic structures, and more specifically, to microfluidic structures and methods including microreactors for manipulating fluids and reactions.
Microfluidic systems typically involve control of fluid flow through one or more microchannels. One class of systems includes microfluidic “chips” that include very small fluid channels and small reaction/analysis chambers. These systems can be used for analyzing very small amounts of samples and reagents and can control liquid and gas samples on a small scale. Microfluidic chips have found use in both research and production, and are currently used for applications such as genetic analysis, chemical diagnostics, drug screening, and environmental monitoring. Although these systems may allow manipulation of small volumes of fluids, additional methods that allow further control and flexibility are needed.
Microfluidic structures including microreactors for manipulating fluids and reactions and methods associated therewith are provided.
In one aspect of the invention, a method is provided. The method comprises providing a microfluidic network comprising a first region and a microfluidic channel in fluid communication with the first region, flowing a first fluid in the microfluidic channel, flowing a first droplet comprising a second fluid in the microfluidic channel, wherein the first fluid and the second fluid are immiscible, positioning the first droplet at the first region, and maintaining the first droplet at the first region while the first fluid is flowing in the microfluidic channel, wherein positioning and/or maintaining the first droplet at the first region does not require the use of a surfactant in the first or second fluids.
In some instances in connection with the methods described herein, the first and/or second fluids does not comprise a surfactant. The method may further comprise flowing a second droplet comprising a third fluid in the microfluidic channel, wherein the third fluid and the first fluid are immiscible, and positioning the second droplet at a second region in fluid communication with the microfluidic channel. In some instances, the third fluid does not comprise a surfactant. In other instances, the first and second droplets do not come into physical contact with each other during the positioning and/or maintaining steps.
In some embodiments in connection with the methods described herein, positioning and/or maintaining the first droplet at the first region is independent of flow rate of the first fluid in the microfluidic channel.
In some embodiments in connection with the methods described herein, the first region is closer in distance to a first inlet of the microfluidic network for introducing the first fluid into the microfluidic channel than the second region.
In some embodiments in connection with the methods described herein, the first droplet is positioned at the first region before the second droplet is positioned in the second region.
In some embodiments in connection with the methods described herein, the method further comprises removing the first droplet from the first region and then removing the second droplet from the second region.
In some embodiments in connection with the methods described herein, the method comprises flowing a fluid comprising a surfactant in the microfluidic channel.
In some embodiments in connection with the methods described herein, the method comprises coating the first and/or second droplets with a surfactant.
In some embodiments in connection with the methods described herein, the method comprises dewetting the first and/or second droplets from a surface of the microfluidic channel.
In some embodiments in connection with the methods described herein, the first and second droplets are removed from the first and second regions, respectively, by reversing a direction of flow in the microfluidic channel.
In some embodiments in connection with the methods described herein, positioning of the first droplet at the first region affects a direction of flow of a second droplet in the microfluidic network compared to when the first droplet is not positioned at the first region.
In some embodiments in connection with the methods described herein, the first droplet is positioned at the first region while the first fluid is flowing in the microfluidic channel.
In some embodiments in connection with the methods described herein, the microfluidic channel comprises an upstream portion, a downstream portion, and first and second fluid paths, at least one fluid path branching from the upstream portion and reconnecting at the downstream portion.
In some embodiments in connection with the methods described herein, the first and second fluid paths have different resistances to flow.
In some embodiments in connection with the methods described herein, the first region is positioned within the first fluid path. In some cases, the first fluid path has less resistance to flow compared to the second fluid path prior to positioning of a first droplet at the first region, and the first fluid path has greater resistance to flow after positioning of the first droplet at the first region.
In some embodiments in connection with the methods described herein, the method comprises positioning several droplets at regions of the microfluidic network, wherein the droplets are positioned in the regions in the order the droplets are introduced into the microfluidic network.
In some embodiments in connection with the methods described herein, the method comprises removing several droplets positioned at regions of the microfluidic network, wherein the droplets are removed in the order the droplets were introduced into the microfluidic network.
In some embodiments in connection with the methods described herein, the method comprises removing several droplets positioned at regions of the microfluidic network, wherein the droplets are removed in the reverse order the droplets were introduced into the microfluidic network.
In another aspect of the invention, a method is provided. The method comprises providing a microfluidic network comprising at least a first inlet to a microfluidic channel, a first and a second region for positioning a first and a second droplet, respectively, the first and second regions in fluid communication with the microfluidic channel, wherein the first region is closer in distance to the first inlet than the second region, flowing a first fluid in the microfluidic channel, flowing a first droplet, defined by a fluid immiscible with the first fluid, in the microfluidic channel, positioning the first droplet at the first region, flowing a second droplet, defined by a fluid immiscible with the first fluid, in the microfluidic channel past the first region without the second droplet physically contacting the first droplet, and positioning the second droplet at the second region.
In one aspect of the invention, a method is provided. The method comprises positioning a first droplet defined by a first fluid, and a first component within the first droplet, in a first region of a microfluidic network, forming a first precipitate of the first component in the first droplet while the first droplet is positioned in the first region, dissolving a portion of the first precipitate of the first compound within the first droplet while the first droplet is positioned in the first region, and re-growing the first precipitate of the first component in the first droplet.
In another aspect of the invention, a method is provided. The method comprises positioning a droplet defined by a first fluid, and a first component within the droplet, in a first region of a microfluidic network, the droplet being surrounded by a second fluid immiscible with the first fluid, positioning a third fluid in a reservoir positioned adjacent to the first region, the reservoir being separated from the region by a semi-permeable barrier, changing a concentration of the first component within the first fluid of the droplet, and allowing a concentration-dependent chemical process involving the first component to occur within the droplet.
In another aspect of the invention, a method is provided. The method comprises positioning a droplet defined by a first fluid, and a first component within the droplet, in a first region of a microfluidic network, the droplet being surrounded by a second fluid immiscible with the first fluid, flowing a third fluid in a microfluidic channel in fluid communication with the first region and causing a portion of the second fluid to be removed from the first region, changing the volume of the droplet and thereby changing a concentration of the first component within the droplet, and allowing a concentration-dependent chemical process involving the first component to occur within the droplet.
In another aspect of the invention, a device is provided. The device comprises a fluidic network comprising a first region and a first microfluidic channel allowing fluidic access to the first region, the first region constructed and arranged to allow a concentration-dependent chemical process to occur within said first region, wherein the first region and the first microfluidic channel are defined by voids within a first material, a reservoir adjacent to the first region and a second microfluidic channel allowing fluidic access to the reservoir, the reservoir defined at least in part by a second material that can be the same or different than the first material, a semi-permeable barrier positioned between the reservoir and the first region, wherein the barrier allows passage of a first set of low molecular weight species, but inhibits passage of a second set of large molecular weight species between the first region and the reservoir, the barrier not constructed and arranged to be operatively opened and closed to permit and inhibit, respectively, fluid flow in the first region or the reservoir, wherein the device is constructed and arranged to allow fluid to flow adjacent to a first side of the barrier without the need for fluid to flow through the barrier, and wherein the barrier comprises the first material, the second material, or a combination of the first and second materials.
In another aspect of the invention, a method is provided. The method comprises providing a fluidic network comprising a first region, a microfluidic channel allowing fluidic access to the first region, a reservoir adjacent to the first region, and a semipermeable barrier positioned between the first region and the reservoir, wherein the first region is constructed and arranged to allow a concentration-dependent chemical process to occur within the first region, and wherein the barrier allows passage of a first set of low molecular weight species, but inhibits passage of a second set of large molecular weight species between the first region and the reservoir, providing a droplet defined by a first fluid in the first region, providing a second fluid in the reservoir, causing a component to pass across the barrier, thereby causing a change in a concentration of the first component in the first region, and allowing a concentration-dependent chemical process involving the first component to occur within the first region.
In another aspect of the invention, a method is provided. The method comprises providing a fluidic network comprising a first region and a first microfluidic channel allowing fluidic access to the first region, the first region constructed and arranged to allow a concentration-dependent chemical process to occur within said first region, wherein the first region and the microfluidic channel are defined by voids within a first material, positioning a first fluid containing a first component in the first region, positioning a second fluid in a reservoir via a second microfluidic channel allowing fluidic access to the reservoir, the reservoir and the second microfluidic channel being defined by voids in a second material, and the reservoir being separated from the first region by a semi-permeable barrier, wherein the barrier comprises the first and/or second materials, changing a concentration of the first component in the first region, and allowing a concentration-dependent chemical process involving the first component to occur within the first region.
In another aspect of the invention, a method is provided. The method comprises positioning a first droplet defined by a first fluid, and a first component within the droplet, in a first region of a microfluidic network, positioning a second droplet defined by a second fluid, and a second component within the droplet, in a second region of the microfluidic network, wherein the first and second droplets are in fluid communication with each other, forming a first precipitate of the first component in the first droplet while the first droplet is positioned in the first region, forming a second precipitate of the second component in the second droplet while the second droplet is positioned in the second region, simultaneously dissolving a portion of the first precipitate and a portion of the second precipitate within the first and second droplets, respectively, and re-growing the first precipitate in the first droplet and re-growing the second precipitate in the second droplet, while the first and second droplets are positioned in the first and second regions, respectively.
In another aspect of the invention, a method is provided. The method comprises providing a microfluidic network comprising a first region and a microfluidic channel in fluid communication with the first region, the first region having at least one dimension larger than a dimension of the microfluidic channel, flowing a first fluid in the microfluidic channel, flowing a first droplet comprising a second fluid in the microfluidic channel, wherein the first fluid and the second fluid are immiscible, and while the first fluid is flowing in the microfluidic channel, positioning the first droplet in the first region, the first droplet having a lower surface free energy when positioned in the first region than when positioned in the microfluidic channel.
In another aspect of the invention, a method is provided. The method comprises providing a microfluidic network comprising a first region and a microfluidic channel in fluid communication with the first region, flowing a first fluid in the microfluidic channel, flowing a first droplet comprising a second fluid in the microfluidic channel, wherein the first fluid and the second fluid are immiscible, while the first fluid is flowing in the microfluidic channel, positioning the first droplet in the first region, and maintaining the first droplet in the first region while the first fluid is flowing in the microfluidic channel.
In another aspect of the invention, a method is provided. The method comprises providing a microfluidic network comprising at least a first inlet to a microfluidic channel, a first and a second region for positioning a first and a second droplet, respectively, the first and second regions in fluid communication with the microfluidic channel, wherein the first region is closer in distance to the first inlet than the second region, flowing a first fluid in the microfluidic channel, flowing a first droplet, defined by a fluid immiscible with the first fluid, in the microfluidic channel, while the first fluid is flowing in the microfluidic channel, positioning the first droplet in the first region, flowing a second droplet, defined by a fluid immiscible with the first fluid, in the microfluidic channel, while the first fluid is flowing in the microfluidic channel, positioning the second droplet in the second region, and maintaining the first droplet in the first region and the second droplet in the second region, respectively, while the first fluid is flowing in the microfluidic channel.
In another aspect of the invention, a method is provided. The method comprises providing a microfluidic network comprising at least a first inlet to a microfluidic channel, and a first and a second region for positioning a first and a second droplet, respectively, the first and second regions in fluid communication with the microfluidic channel, flowing a first fluid at a first flow rate in the microfluidic channel, flowing a first droplet, defined by a fluid immiscible with the first fluid, in the microfluidic channel, flowing a second droplet, defined by a fluid immiscible with the first fluid, in the microfluidic channel, flowing the first fluid at a second flow rate in the microfluidic channel, wherein the second flow rate is slower than the first flow rate, and while the first fluid is flowing at the second flow rate, positioning the first droplet in the first region and positioning the second droplet in the second region.
Other advantages and novel features of the present invention will become apparent from the following detailed description of various non-limiting embodiments of the invention when considered in conjunction with the accompanying figures. In cases where the present specification and a document incorporated by reference include conflicting and/or inconsistent disclosure, the present specification shall control. If two or more documents incorporated by reference include conflicting and/or inconsistent disclosure with respect to each other, then the document having the later effective date shall control.
Non-limiting embodiments of the present invention will be described by way of example with reference to the accompanying figures, which are schematic and are not intended to be drawn to scale. In the figures, each identical or nearly identical component illustrated is typically represented by a single numeral. For purposes of clarity, not every component is labeled in every figure, nor is every component of each embodiment of the invention shown where illustration is not necessary to allow those of ordinary skill in the art to understand the invention. In the figures:
The present invention relates to microfluidic structures and methods for manipulating fluids and reactions. Such structures and methods may involve positioning fluid samples, e.g., in the form of droplets, in a carrier fluid (e.g., an oil, which may be immiscible with the fluid sample) in predetermined regions in a microfluidic network, hi some embodiments, positioning of the droplets can take place in the order in which they are introduced into the microfluidic network (e.g., sequentially) without significant physical contact between the droplets. Because of the little or no contact between the droplets, coalescence between the droplets can be avoided. Accordingly, in such embodiments, surfactants are not required in either the fluid sample or the carrier fluid to prevent coalescence of the droplets. Positioning of droplets without the use of surfactants is desirable in certain cases where surfactants may negatively interfere with the contents in the fluid sample (e.g., proteins). Structures and methods described herein also enable droplets to be removed sequentially from the predetermined regions to a different region of the fluidic network where they can be further processed.
Once the droplets are positioned at the predetermined regions, they can be stored and/or may undergo manipulation (e.g., diffusion, evaporation, dilution, and precipitation). In some instances, many (e.g., 1000) droplets can be manipulated, sometimes simultaneously. Manipulation of fluid samples can be useful for a variety of applications, including testing for reaction conditions, e.g., in crystallization, and chemical and/or biological assays.
Microfluidic chips described herein may include a microfluidic network having a region for forming droplets of sample in a carrier fluid (e.g., an oil), and one or more microreactor regions (e.g., microwells, reservoirs, or portions of a microfluidic channel) in which the droplets can be positioned and reaction conditions within the droplet can be varied. Droplets may be positioned sequentially in regions of the microfluidic network so that upon manipulating and/or performing a chemical and/or biological process within each the droplets, the droplets can be identified at a later time, for example, to determine the particular conditions within the droplets that lead to a favorable outcome (e.g., optimal conditions for forming a product, for crystal growth, etc.).
As shown in
Although
As shown in the embodiment illustrated in
It should be understood that when droplet 1020 is positioned at region 1028, the droplet may plug all or a portion of fluid path 1014 and/or narrow fluid path portion 1024. For instance, in some cases, the droplet plugs all of such fluid paths such that none of the fluid flowing in microfluidic channel 1002 passes through narrow fluid path portion 1024. In other embodiments, the droplet may plug only a portion of such fluid paths such that some fluid passes through narrow fluid path portion 1024 even though the droplet is positioned at region 1028. The amount of fluid flowing past the droplet may depend on factors such as the dimensions of fluid path portions 1014 and/or 1024, the size of the droplets, the flow rate, etc. As long as the droplet causes fluid path 1014 to have a higher relative resistance to fluid flow than fluid path 1018, a second droplet can bypass fluid path 1014 and enter fluid path 1018.
As described above, fluid paths 1014 and 1018 may have different resistances fluid flow depending on whether or not a droplet is positioned at region 1028. In the absence of a droplet positioned at region 1028, fluid path 1014 may be configured to have a lower resistance to fluid flow than fluid path 1018. For example, greater than 50%, greater than 60%, greater than 70%, greater than 80%, or greater than 90% of the fluid flowing in channel 1002 at upstream portion 1006 may flow in fluid path 1014 compared to fluid path 1018. However, when the droplet is positioned and maintained in region 1028, fluid path 1014 may be relatively more restrictive to fluid flow. For example, less than 50%, less than 40%, less than 30%, less than 20%, or less than 10% of the fluid flowing in channel 1002 at upstream portion 1006 may flow in fluid path 1014 compared to that of 1018. In some cases, 100% of the fluid flowing in direction 1012 in microfluidic channel 1002 flows in fluid path 1018 upon positioning of a droplet in region 1028.
As illustrated in the exemplary embodiment of
In some embodiments, methods for positioning a droplet in a microfluidic network include the steps of providing a microfluidic network comprising a first region (e.g., region 1028 of
In some embodiments, a chemical and/or biological process can be carried out in droplet 1020 of
In some embodiments of the invention, droplets that have been positioned at regions of a microfluidic network can be removed or extracted from the regions to a different location in the fluidic network, where they can be optionally processed, manipulated, and/or collected. As shown in the illustrative embodiments of
In such embodiments, upstream portion 1006 and downstream portion 1010 of
In some embodiments, sequential positioning of droplets can be performed such that a first droplet is positioned in a first region before a second droplet is positioned in a second region (and, optionally, before third, fourth, fifth droplets, etc. are positioned in their respective regions). As described above, sequential removal of the droplets can be performed such that the first droplet is removed from a region and/or positioned at a different location on the microfluidic network before the second droplet (and, optionally, before third, fourth, fifth droplets, etc. are removed from their respective regions). In other embodiments, removal of the droplets can be performed such that the second droplet is removed and/or positioned at a different location on the microfluidic network before the first droplet.
In some cases, several (e.g., greater than 2, greater than 5, greater than 10, greater than 50, greater than 100, greater than 200, greater than 500, or greater than 1000) droplets can be positioned at regions of the microfluidic network, wherein the droplets are positioned in the regions in the order the droplets are introduced into the microfluidic network. In some cases, removing several droplets positioned at regions of the microfluidic network comprises removing the droplets in the order the droplets were introduced into the microfluidic network (or in the order the droplets were positioned into the regions of the microfluidic network). In other cases, removing several droplets positioned at regions of the microfluidic network comprises removing the droplets in the reverse order the droplets were introduced into the microfluidic network (or in the reverse order the droplets were positioned into the regions of the microfluidic network). Other methods of positioning and removal of droplets are also possible.
The sequential (or predetermined/known order of) removal of droplets from regions of a microfluidic network can allow control over the identification and location of each droplet within the network. This can also allow determination of the contents inside each of the droplets from the time they are formed and/or introduced into the microfluidic network, to the time the droplets are manipulated and/or extracted from the microfluidic network.
A microfluidic network may have any suitable number of microfluidic sections 1001. For instance, the microfluidic network may have greater than or equal to 5, greater than or equal to 10, greater than or equal to 30, greater than or equal to 70, greater than or equal to 100, greater than or equal to 200, greater than or equal to 500, or greater than or equal to 1000 such sections.
In addition, although certain embodiments herein show that sections 1001 can allow positioning of a single droplet in each of the sections, in other embodiments, the sections can be designed such that greater than one droplet (e.g., greater than or equal to 2, greater than or equal to 5, or greater than or equal to 10 droplets) can be positioned at each section.
Furthermore, although only two fluid flow paths 1014 and 1018 are shown branching off from channel 1002, in other embodiments, more than two (e.g., greater than or equal to 3, greater than or equal to 5, or greater than or equal to 10) fluid paths may branch off from channel 1002. Each branching fluid path may optionally comprise one or more regions (e.g., microwells) for positioning and/or maintaining droplets.
Once droplet 1060 is positioned at region 1028-A, it impedes fluid flow through narrow fluid path portion 1024-A such that the resistance to fluid flow in fluid paths 1014-A and 1018-A are altered. This causes resistance to fluid flow to be higher in portion 1014-A and as a result, a greater amount of fluid flows in the direction of 1070 through fluid path portion 1018-A. Accordingly, a second droplet 1062 flowing through microfluidic channel 1002-A and passing upstream portion 1006 now bypasses fluid path portion 1014-A and flows through portion 1018-A. The second droplet, after bypassing region 1028-A, now enters microfluidic channel portion 1002-B. If there is a lower resistance to fluid flow in fluid path portion 1014-B (e.g., a droplet has not already been positioned in region 1028-B), the droplet can be positioned at this region. Next, a third droplet 1064 can flow through microfluidic channel portion 1002-A in the direction of arrow 1012 and first bypasses region 1028-A due to droplet 1060 already positioned at that region. The droplet can then flow into fluid path portion 1018-A and 1002-B. Since droplet 1062 has already been positioned at region 1028-B, third droplet 1064 bypasses this region and takes the fluid path of least resistance (fluid path portion 1018-B). Upon entering an empty region such as 1028-C, the third droplet can now position itself at that region due to a lower resistance to fluid flow in fluid path 1014-C compared to that of fluid path portion 1018-C (e.g., prior to any other droplet being positioned at region 1028-C).
Accordingly, a method for positioning droplets in regions of a microfluidic network may include providing a microfluidic network comprising at least a first inlet to a microfluidic channel (e.g., positioned upstream of portion 1006 of
It should be understood that other components may be integrated with fluidic networks described herein in some embodiments of the invention. For example, in some instances, resistances to fluid flow can be changed dynamically such that the direction of fluid flow (and, therefore, positioning of droplets) can be controlled by the user. In one such embodiment, valves may be positioned at one or more of positions 1070-A, 1070-B, and 1070-C of
As described herein, in some embodiments droplets do not require stabilization (e.g., the use of surfactants or other stabilizing agents) in order to be positioned at predetermined regions within microfluidic networks described herein. This is because in some embodiments, the droplets do not significantly physically contact one another during bypass of one droplet to another. Due to the little or no physical contact between the droplets, the droplets do not have a chance to coalesce with one another. Thus, surfactants or other stabilizing agents are not required to stabilize the droplets from coalescence in such embodiments. In some embodiments, the absence of surfactants or other stabilizing agents causes the droplets to wet a surface of the microfluidic network. Even though wetting may occur, the droplets can still be positioned at predetermined regions within the microfluidic network due to, for example, a positive pressure that causes fluid flow to carry these droplets into these regions. As discussed above, the use of droplets and/or a carrier fluid that does not contain a surfactant is advantageous in some embodiments where surfactants may negatively interfere with contents inside the droplets. For example, the droplets may contain proteins, and surfactants are known to denature certain proteins to some extent. However, after manipulation of the droplet and/or carrying out a process such as a chemical and/or biological reaction inside the droplet, surfactants may no longer negatively affect the contents inside the droplet. Accordingly, in such cases, a surfactant or other stabilizing agent can be applied to the droplets. In some embodiments, such application of a stabilizing agent to a droplet after manipulation of the droplet and/or carrying out a process inside the droplet can facilitate mobilization of the droplet out of the region in which the droplet is positioned.
It should be understood, however, than in some embodiments, a droplet and/or a carrier fluid may contain a surfactant or other stabilizing agent that stabilizes a droplet prior to positioning of the droplet at a region in the microfluidic network. In such embodiments, the stabilization may not negatively interfere with contents (e.g., reagents) inside the droplet. Of course, such embodiments will depend on a variety of factors such as the type of stabilizing agent used, the contents inside the droplet, the application, etc.
It should be understood that a fluid containing a stabilizing agent can be introduced into microfluidic network 1090 in any suitable manner. For example, in some embodiments, the stabilizing agent may be introduced by a fluid flowing in the direction of arrow 1012. In other embodiments, region 1028 may be in fluidic communication with another portion of the device branching from region 1028. For instance, above or below region 1028 may be a reservoir, a channel, or other component that can be used to introduce a stabilizing agent or other entity to a droplet in that region.
As shown in
As described above, methods for storing and/or extracting droplets in a microfluidic network are provided herein. In some embodiments, the droplets may be stored and/or extracted in sequential order. For example, the droplets may be extracted in the order they are stored or positioned in predetermined regions in the microfluidic network. Advantageously, in some embodiments, such methods do not require the use of surfactants or other stabilizing agents, since the droplets may not come into substantial physical contact with one another in a manner that causes coalescence. This is advantageous in certain cases as surfactants may interfere with contents such as proteins inside the droplet, as is known to those of ordinary skill in the art.
In some embodiments, the microfluidic networks shown in
As described above, microfluidic chips described herein may include a region for forming droplets of sample in a carrier fluid (e.g., an oil), and one or more microreactor regions (also called “predetermined regions” or “regions” herein) in which the droplets can be positioned and reaction conditions within the droplet can be varied. For instance, one such system includes microreactor regions containing several (e.g., 1000) microwells or other structures that are fluidically connected to a microchannel, or formed as a part of the microchannel. A reservoir (i.e., in the form of a chamber or a channel) for containing a gas or a liquid can be situated underneath a microwell, separating the microwell by a semi-permeable barrier (e.g., a dialysis membrane). In some cases, the semi-permeable barrier enables chemical communication of certain components between the reservoir and the microwell; for instance, the semi-permeable barrier may allow water, but not proteins, to pass across it. Using the barrier, a condition in the reservoir, such as concentration or ionic strength, can be changed (e.g., by replacing the fluid in the reservoir), thus causing the indirect change in a condition of a droplet positioned inside the microwell. This format allows control and the testing of many reaction conditions simultaneously. Microfluidic chips and methods of the invention can be used in a variety of settings. One such setting, described in more detail below, involves the use of a microfluidic chip for crystallizing proteins within aqueous droplets of fluid. Advantageously, crystallization conditions can be controlled such that nucleation and growth of crystals can be decoupled, performed reversibly, and controlled independently of each other, thereby enabling the formation of defect-free crystals.
Droplets formed from region 2015 can enter one, or more, of microreactor regions 2020, 2025, 2030, 2035, or 2040 via channel 2085. The particular microreactor region in which the droplets enter can be controlled by valves 2090, 2095, 2100, 2105, 2110, and/or 2111, which can be activated by valve controls 2092, 2094, 2096, 2098, 2102, 2104, 2106, 2108, 2112, 2114, and/or 2116. For example, for droplets to enter microreactor region 2020, valve 2090 can be opened by activating valve controls 2092 and 2094, while valves 2095, 2100, 2105, 2110, and 2111 are closed. This may allow the droplets to flow into channel 2115 in the direction of arrow 2120, and then into channel 2125 and to several microwells 2130 (
As shown in
In the embodiment illustrated in
It is to be understood that the structural arrangement illustrated in the figures and described herein is but one example, and that other structural arrangement can be selected. For example, a microfluidic network can be created by casting or spin coating a material, such as a polymer, from a mold such that the material defines a substrate having a surface into which are formed channels, and over which a layer of material is placed to define enclosed channels such as microfluidic channels. In another arrangement a material can be cast, spin-coated, or otherwise formed including a series of voids extending throughout one dimension (e.g., the thickness) of the material and additional material layers are positioned on both sides of the first material, partially or fully enclosing the voids to define channels or other fluidic network structures. The particular fabrication method and structural arrangement is not critical to many embodiments of the invention. In other cases, a particular structural arrangement or set of structural arrangements can define one or more aspects of the invention, as described herein.
The formation of droplets at intersection 2075 of device 2000 is shown in
Droplets of varying sizes and volumes may be generated within the microfluidic system. These sizes and volumes can vary depending on factors such as fluid viscosities, infusion rates, and nozzle size/configuration. In some cases, it may be desirable for each droplet to have the same volume so that different conditions (e.g., concentrations) can be tested between different droplets, while the initial volumes of the droplets are constant. In other cases, it may be suitable to generate different volumes of droplets for use in an assay. Droplets may be chosen to have different volumes depending on the particular application. For example, droplets can have volumes of less than 1 μL, less than 0.1 μL, less than 10 nL, less than 1 nL, less than 0.1 nL, or less than 10 pL. It may be suitable to have small droplets (e.g., 10 pL or less), for instance, when testing many (e.g., 1000) droplets for different reaction conditions so that the total volume of sample consumed is low. On the other hand, large (e.g., 10 nL-1 μL) droplets may be suitable, for instance, when a reaction condition is known and the objective is to generate large amounts of product within the droplets.
The rate of droplet formation can be varied by changing the flow rates of the aqueous and/or oil solutions (or other combination of immiscible fluids defining carrier fluid and droplet, which behave similarly to oil and water, and which can be selected by those of ordinary skill in the art). Any suitable flow rate for producing droplets can be used; for example, flow rates of less than 100 nL/s, less than 10 nL/s, or less than 1 nL/s. In one embodiment, droplets having volumes between 0.1 to 1.0 nL can be formed while flow rates are set at 100 nL/s. Under these conditions, droplets can be produced at a frequency of 100 droplets/s. In another embodiment, the flow rates of two aqueous solutions can be varied, while the flow rate of the oil solution is held constant, as discussed in more detail below.
FIGS. 11A-11F-1 show one example of a method for positioning droplets within regions of a microfluidic channel. In the embodiment illustrated in
Because droplets are carried past each other (e.g., as in
Different types of carrier fluids can be used to carry droplets in a device. Carrier fluids can be hydrophilic (i.e., aqueous) or hydrophobic (i.e., an oil), and may be chosen depending on the type of droplet being formed (i.e., aqueous or oil-based) and the type of process occurring in the droplet (i.e., crystallization or a chemical reaction). In some cases, a carrier fluid may comprise a fluorocarbon. In some embodiments, the carrier fluid is immiscible with the fluid in the droplet. In other embodiments, the carrier fluid is slightly miscible with the fluid in the droplet. Sometimes, a hydrophobic carrier fluid, which is immiscible with the aqueous fluid defining the droplet, is slightly water soluble. For example, oils such as PDMS and poly(trifluoropropylmethylsiloxane) are slightly water soluble. These carrier fluids may be suitable when fluid communication between the droplet and another fluid (i.e., a fluid in the reservoir) is desired. Diffusion of water from a droplet, through the carrier fluid, and into a reservoir containing air is one example of such a case.
A droplet can enter into an empty microwell by a variety of methods. In the embodiment shown in
In another embodiment, a method for positioning droplets into regions (e.g., microwells) of a microfluidic network comprises flowing a plurality (e.g., at least 2, at least 10, at least 50, at least 100, at least 500, or at least 1,000) of droplets in a carrier fluid in a microfluidic channel at a first flow rate. The first flow rate may be fast, for instance, for forming many droplets quickly and/or for filling the microfluidic network quickly with many droplets. At a fast flow rate, the droplets may not position into the regions. When the carrier fluid is flowed at a second flow rate slower than the first flow rate, however, each droplet may position into a region closest to the droplet and remain in the region. This method of filling microwells is referred to as the “fast flow/slow flow” method. Using this method, the droplets can be positioned in the order that the droplets are flowed into the channel, although in some instances, not every region may be filled (i.e., a first and a second droplet that are positioned in their respective regions may be separated by an empty region). Since this method does not require droplets to pass over filled regions (e.g., microwells containing droplets), as is the case as shown in FIGS. 11A-11F-1, the droplets may not require surfactants when this method of positioning is implemented.
Another method for filling microwells in the order that the droplets are formed is by using valves at entrances and exits of the microwells, as shown in
Microwells may have any suitable size, volume, shape, and/or configuration, i.e., for positioning a droplet depending on the application. For example, microwells may have a cross-sectional dimension of less than about 250 μm, less than about 100 μm, or less than about 50 μm. In some embodiments, microwells can have a volume of less than 10 μL, less than 1 μL, less than 0.1 μL, less than 10 nL, less than 1 nL, less than 0.1 nL, or less than 10 pL. Microwells may have a large volume (e.g., 0.1-10 μL) for storing large droplets, or small volumes (e.g., 10 pL or less) for storing small droplets.
In the embodiment illustrated in FIGS. 11A-11F-1, microwells 2081, 2082, and 2083 have the same dimensions. However, in certain other embodiments, the microwells can have different dimensions relative to one another, e.g., for holding droplets of different sizes. For instance, a microfluidic chip can comprise both large and small microwells, where large droplets may favor the large microwells and small droplets may favor the small microwells. By varying the size of the microwells and/or the size of the droplets on a chip, positioning of the droplets not only depends on whether or not the microwell is empty, but also on whether or not the sizes of the microwell and the droplet match. The positioning of different droplets of different sizes may be useful for varying reaction conditions within an assay.
In another embodiment, microwells 2081, 2082, and 2083 have different shapes. For example, one microwell may be square, another may be rectangular, and another may have a pyramidal shape. Different shapes of microwells may allow droplets to have different surface energies while positioned in the microwell, and can cause a droplet to favor one shape over another. Different shapes of microwells can also be used in combination with droplets of different size, such that droplets of certain sizes favor particular shapes of microwells.
Sometimes, a droplet can be released from a microwell, e.g., after a reaction has occurred inside of a droplet. Different sizes, shapes, and/or configurations of microwells may influence the ability of a droplet to be released from the microwell.
In some cases, the size of the microwell is approximately the same size as the droplet, as shown in FIGS. 11A-11F-1. For instance, the volume of the microwell can be less than approximately twice the volume of the droplet. This is particularly useful for positioning a single droplet within a single microwell. In other cases, however, more than one droplet can be positioned in a microwell. Having more than one droplet in a microwell can be useful for applications that require the merging of two droplets into one larger droplet, and for applications that include allowing a component to pass (e.g., diffuse) from one droplet to another adjacent droplet.
Although many embodiments illustrated herein show the positioning of droplets in microwells, in some cases, microwells are not required for positioning droplets. For instance, in some cases, a droplet is positioned in a region in fluid communication with the channel, the region having a different affinity for the droplet than does another part of the channel. The region may be positioned on a wall of the channel. In one embodiment, the region can protrude from a surface (e.g., a side) of the channel. In another embodiment, the region can have at least one dimension (e.g., a width or height) larger than a dimension of the channel. A droplet that is carried in the channel may be positioned into the region by the lowering of the surface energy of the droplet when positioned in the region, relative to the surface energy of the droplet prior to being positioned in the region.
In another embodiment, positioning of a droplet does not require the use of differences in dimension between the region and the channel. A region may have a patterned surface (e.g., a hydrophobic or hydrophilic patch, a surface patterned with a specific chemical moiety, or a magnetic patch) that favors the positioning and/or containing of a droplet. Different methods of positioning, e.g., based on hydrophobic/hydrophilic interactions, magnetic interactions, or electrical interactions such as dielectrophoresis, electrophoresis, and optical trapping, as well as chemical interactions (e.g., covalent interactions, hydrogen-bonding, van der Waals interactions, and adsorption) between the droplet and the first region are possible. In some cases, the region may be positioned in, or adjacent to, the channel, for example.
In some instances, a condition within a droplet can be controlled after the droplet has been formed. For example,
As shown in
A fluidic chip can include several reservoirs that are controlled independently (or dependently) of each other. For instance, a device can include greater than 1, great than 5, greater than 10, greater than 100, greater than 1,000, or greater than 10,000 reservoirs. A large number (e.g., 100 or more) of reservoirs may be suitable for a chip in which reservoirs and microwells are paired such that a single reservoir is used to control conditions in a single microwell. A small number (e.g., 10 or less) of reservoirs may be suitable when it is favorable for many microwells to experience the same changes in conditions relative to one another. This type of system can be used, for example, for increasing the size of many droplets (i.e., diluting components within the droplets) simultaneously.
Reservoir 2140 typically has at least one cross-sectional dimension in the micron-range. For instance, the reservoir may have a length, width, or height of less than 500 μm, less than 250 μm, less than 100 μm, less than 50 μm, less than 10 μm, or less than 1 μm. The volume of the reservoir can also vary; for example, it may have a volume of less than 50 μL, less than 10 μL, less than 1 μl, less than 100 nL, less than 10 nL, less than 1 nL, less than 100 pL, or less than 10 pL. In one particular embodiment, a reservoir can have dimensions of 10 mm by 3 mm by 50 μm and a volume of less than 20 μL.
A large reservoir (e.g., a reservoir having a large cross-sectional dimension and/or a large volume) may be useful when the reservoir is used to control the conditions in several (e.g., 100) microwells, and/or for storing a large amount of fluid. A large amount of fluid in the reservoir can be useful, for example, when droplets are stored for a long time (i.e., since, in some embodiments, material from the droplet may permeate into surrounding areas or structures over time). A small reservoir (e.g., a reservoir having a small cross-sectional dimension and/or a small volume) may be suitable when a single reservoir is used to control conditions in a single microwell and/or for cases where a droplet is stored for shorter periods of time.
Semi-permeable barrier 2150 is another factor that controls the rate of equilibration or the rate of passage of a component between the reservoir and the microwells. In other words, the semi-permeable barrier controls the degree of chemical communication between two sides of the barrier. Examples of semi-permeable barriers include dialysis membranes, PDMS membranes, polycarbonate films, meshes, porous layers of packed particles, and the like. Properties of the barrier that may affect the rate of passage of a component across the barrier include: the material in which the barrier is fabricated, thickness, porosity, surface area, charge, and hydrophobicity/hydrophilicity of the barrier.
The barrier may be fabricated in any suitable material and/or in any suitable configuration in order to permit one set of components and inhibit another set of components from crossing the barrier. In one embodiment, the semi-permeable barrier comprises the material from which the reservoir is formed, i.e., as part of layer 2149 as shown in
In some cases, the barrier is fabricated in a polymer (e.g., a siloxane, polycarbonate, cellulose, etc.) that allows passage of a first set of low molecular weight components, but inhibits the passage of a second set of large molecular weight components across the barrier. For instance, a first set of low molecular weight components may include water, gases (e.g., air, oxygen, and nitrogen), water vapor (e.g., saturated or unsaturated), and low molecular weight organic solvents (e.g., hexadecane), and the second set of large molecular weight components may include proteins, polymers, amphiphiles, and/or others species. Those of ordinary skill in the art can readily select a suitable material for the barrier based upon e.g., its porosity, its rigidity, its inertness to (i.e., freedom from degradation by) a fluid to be passed through it, and/or its robustness at a temperature at which a particular device is to be used.
The semi-permeable barrier may have any suitable thickness for allowing one set of components to pass across the barrier while inhibiting another set of components. For example, a semi-permeable barrier may have a thickness of less than 10 mm, less than 1 mm, less than 500 μm, less than 100 μm, less than 50 μm, or less than 20 μm, or less than 1 μm. A thick barrier (e.g., 10 mm) may be useful for allowing slow passage of a component between the reservoir and the microwell. A thin barrier (e.g., less than 20 μm thick) can be used when it is desirable for a component to be passed quickly across the barrier.
For size exclusive semi-permeable barriers (i.e., including dialysis membranes), the pores of the barriers can have different shapes and/or sizes. In one embodiment, the sizes of the pores of the barrier are based on the inherent properties of the barrier, such as the degree of cross-linking of the material in which the barrier is fabricated. In another embodiment, the pores of the barrier are machine-fabricated in a film of a material. Semi-permeable barriers may have pores sizes of less than 100 μm, less than 10 μm, less than 1 μm, less than 100 nm, less than 10 nm, or less than 1 nm, and may be chosen depending on the component to be excluded from crossing the barrier.
A semi-permeable barrier may exclude one or more components from passing across it by methods other than size-exclusion, for example, by methods based on charge, van der Waals interactions, hydrophilic or hydrophobic interactions, magnetic interactions, and the like. For instance, the barrier may inhibit magnetic particles but allow non-magnetic particles to pass across it (or vice versa).
Different methods of passing a component across the semi-permeable barrier can be used. For instance, in one embodiment, the component may diffuse across the barrier if there is a difference in concentration of the component between the micro well and the reservoir. In another embodiment, if the component is water, water can pass across the barrier by osmosis. In yet another embodiment, the component can evaporate across the barrier; for instance, a fluid in the microwell can evaporate across the barrier if a gas is positioned in the reservoir. In some cases, the component can cross the barrier by bulk or mass flow in response to a pressure gradient in the microwell or the reservoir. In other cases, the component can cross the barrier by methods such as facilitated diffusion or by active transport. A combination of modes of transport can also be applied. Typically, however, the barrier is not constructed and arranged to be operatively opened and closed to permit and inhibit fluid flow in the reservoir, microwell, or microchannel. For instance, in one embodiment, the barrier does not act as a valve that can operatively open and close to allow and block, respectively, fluidic access to the reservoir, microwell, or microchannel.
In some cases, the barrier is positioned in a device such that fluid can flow adjacent to a first side of the barrier without the need for the fluid to flow through the barrier. For instance, in one embodiment, a barrier is positioned between a reservoir and a microwell; the reservoir has an inlet and an outlet that allow fluidic access to it, and the microwell is fluidically connected to a microchannel having an inlet and an outlet, which allow fluidic access to the microwell. Fluid can flow in the reservoir without necessarily passing across the barrier (i.e., into the microchannel and/or microwell), and the same or a different fluid can flow in the microchannel and/or microwell without necessarily passing across the barrier (i.e., into the reservoir).
Protein in droplet 2079 can be nucleated to form crystal 2300 by concentrating the protein solution within the droplet (
Other methods for nucleating a crystal can also be applied. For instance, two droplets, each of which contain a component necessary for protein crystallization, can be positioned in a single microwell. The two droplets can be fused together into a single droplet, i.e., by changing the concentration of surfactant in the droplets, thereby causing the components of the two droplets to mix. In some cases, these conditions may be suffice to cause nucleation.
As shown in
To decrease the size of the crystal (i.e., so that the crystal can be re-grown to become defect-free), reservoir 2140 can be filled with a buffer of lower salt concentration than that of the protein solution in the droplet. This causes water to flow in the opposite direction, i.e., from the reservoir to the protein solution, which dilutes the protein and the precipitant (e.g., by increasing the volume of the droplet), suppresses further nucleation, and slows down growth (
If the dialysis step of decreasing the size of the crystal proceeds long enough that the crystal dissolves completely, this system (e.g., device 2010) can advantageously allow the processes of nucleation and growth to be reversed, i.e., by changing the fluids in the reservoir. In addition, if small volumes of the droplets (e.g., ˜nL) are used in this system, the device allows faster equilibration times between the droplet and the reservoir than for microliter-sized droplets, which are used in conventional vapor diffusion-based crystallization techniques (e.g., hanging or sitting drop techniques).
In some cases, concentrating the protein solution within the droplet causes the nucleation of precipitate (
As shown in
Device 2010 of
In addition to varying the concentration of solutes within each droplet, the environmental factors influencing crystallization can be changed. For instance, device 2010 includes five independent reservoirs 2140-1, 2140-2, 2140-3, 2140-4, and 2140-5 that can contain solutions of different chemical potential. These reservoirs can be used to vary the degree of supersaturation of the protein solution within the droplets. Thus, the nucleation rate of the first crystal produced and the growth rate of the crystal can be controlled precisely within each droplet. Examples of controlling the sizes of crystals are shown in
As shown in c′ which is accomplished by appropriately varying the reservoir conditions.
The size of a crystal that has been formed in a droplet can vary (i.e., using device 2010 of
In another embodiment, a device having two sections can be used to form crystals. The first section can be used to screen for crystallization conditions, for instance, using very small droplet volumes (e.g., 50 pL), which may be too small for producing protein crystals for X-ray diffraction and for structure determination. Once favorable conditions have been screened and identified, the protein stock solution can be diverted to a second section designed to make droplets of larger size (e.g., 1 nL) for producing crystals suitable for diffraction. Using such a device, screening, e.g., 1000 conditions at 50 pL per screen, consumes only 0.5 μg of protein. Scaling up a subset of 50 conditions to 1 nL (e.g., the most favorable conditions for crystallization) consumes another 0.5 of protein. Thus, it can be possible to screen 1000 conditions for protein crystallization using a total of 1 μg of protein.
In some cases, it is desirable to remove the proteins formed within the microwells of the device, for instance, to load them into vessels such as x-ray capillaries for performing x-ray diffraction, as shown in
As the number of crystallization trials grows, it may be advantageous to automate the detection of crystals. In one embodiment, commercial image processing programs that are interfaced to optical microscopes equipped with stepping motor stages are employed. This software can identify and score “hits” (e.g., droplets and conditions favorable for protein crystallization). This subset of all the crystallization trials can be scanned and select crystals can be transferred to the x-ray capillary.
In another embodiment, a microfluidic device has a temperature control unit. Such a device may be fabricated in PDMS bonded to glass, or to indium tin oxide (ITO) coated glass, i.e., to improve thermal conductivity. Two thermoelectric devices can be mounted on opposite sides of the glass to create a temperature gradient. Thermoelectric devices can supply enough heat to warm or cool a microfluidic device at rates of several degrees per minute over a large temperature range. Alternatively, thermoelectric devices can maintain a stable gradient across the device. For example, device 2010 shown in
In some cases, surfactants are required to prevent coalescence of droplets. For instance, in one embodiment, several droplets can be positioned adjacent to each other in a channel without the use of microwells, i.e., the droplets can line themselves in different arrangements along the length of the channel. In this embodiment, as well as embodiments that involve the passing of droplets beside other droplets (FIGS. 11A-11F-1), a surfactant is required to stabilize the droplets. For each type of oil (i.e., used as a carrier fluid), there exists an optimal surfactant (i.e., an optimum oil/surfactant pair). For example, for a device that is fabricated in PDMS, the ideal pair includes a surfactant that stabilizes an aqueous droplet and does not denature the protein, and an oil that is both insoluble in PDMS, and has a water solubility similar to PDMS. Hydrocarbon-based oils such as hexadecane and dichloromethane can be poor choices, since these solvents swell and distort the PDMS device after several hours. The best candidates may be fluorocarbons and fluorosurfactants to stabilize the aqueous solution because of the low solubility of both PDMS and proteins in fluorinated compounds. The use of a hydrocarbon surfactant to stabilize protein droplets could interfere with membrane protein crystallization of protein-detergent complexes, although it is also possible that surfactants used in the protein-detergent complex also stabilizes the oil/water droplets. In one embodiment, hexadecane is used to create aqueous droplets with a gentle non-ionic detergent (e.g., Span-80) to stabilize the droplets. After the droplets are stored in the microwells, the hexadecane and Span-80 can be flushed out and replaced with fluorocarbon or paraffin oil. This process can allow the hexadecane to reside in the PDMS for a few minutes, which is too short of a time to damage the PDMS device.
In another embodiment, the droplet-stabilizing surfactant can be eliminated by having a device in which there are no microwells, and where the protein droplets are separated in a microchannel by plugs of an oil. For a device that is fabricated in a polymer such as PDMS, an oil separating the protein droplets may dissolve into the bulk of the polymer device over time. This can cause the droplets to coalesce because the droplets are not stabilized by a surfactant. In some cases (e.g., if an oil that is insoluble in the polymer cannot be found and/or if coalescence of droplets is not desired), the microfluidic structure containing the protein channels can be made from glass, and the barriers and valves can be made in a polymer (e.g., PDMS). Because the volume of the barrier is less than the volume of oil, only a small fraction of the oil can dissolve into the barrier, causing the aqueous droplets to remain isolated.
The device described above (i.e., without microwells, and where the protein droplets are separated in a microchannel by plugs of oil) may be used to control the nucleation and growth of crystals similar to that of device 2010. For instance, a semi-permeable barrier can separate the microchannel from a reservoir, and fluids such as air, vapor, water, and saline can be flowed in the reservoir to induce diffusion of water across the barrier. Therefore, swelling and shrinking of the droplet, and the formation and growth of crystals within the droplet, can be controlled.
In other cases, a vapor diffusion process can occur in device 2500. For instance, a portion of the oil that is used as a carrier fluid in microchannel 2125 can be blown out of the channel with a fluid such as a gas (e.g., dry air or water saturated air) by flowing the gas into an inlet of the channel. This process can be performed while the droplet remains in the microwell (
In another embodiment, concentration-dependent chemical processes can occur in a device without the use of droplets. For instance, a first fluid can be positioned in a region of the fluidic network (e.g., in a microwell) and a second fluid can be positioned in a reservoir, the region and the reservoir separated by a semi-permeable barrier. The introduction of different fluids into the reservoir can cause a change in the concentration of components within the first region, i.e., by diffusion of certain components across the semi-permeable barrier.
To overcome the “‘world to chip’ interface problem” of introducing a protein solution into a microfluidic device without wasting portions of the protein solution, e.g., in connections or during the initial purging of air from the microfluidic device, devices of the present invention can be fabricated with an on-chip injection-loop system. For example, buffer region 2022 of
In some embodiments, regions of a fluidic network such as microchannels and micro wells are defined by voids in the structure. A structure can be fabricated of any material suitable for forming a fluidic network. Non-limiting examples of materials include polymers (e.g., polystyrene, polycarbonate, PDMS), glass, and silicon. Those of ordinary skill in the art can readily select a suitable material based upon e.g., its rigidity, its inertness to (i.e., freedom from degradation by) a fluid to be passed through it, its robustness at a temperature at which a particular device is to be used, its hydrophobicity/hydrophilicity, and/or its transparency/opacity to light (i.e., in the ultraviolet and visible regions).
In some instances, a device is comprised of a combination of two or more materials, such as the ones listed above. For instance, the channels of the device may be formed in a first material (e.g., PDMS), and a substrate can be formed in a second material (e.g., glass). In one particular example as shown in
Most fluid channels in components of the invention have maximum cross-sectional dimensions less than 2 mm, and in some cases, less than 1 mm. In one set of embodiments, all fluid channels containing embodiments of the invention are microfluidic or have a largest cross sectional dimension of no more than 2 mm or 1 mm. In another embodiment, the fluid channels may be formed in part by a single component (e.g., an etched substrate or molded unit). Of course, larger channels, tubes, chambers, reservoirs, etc. can be used to store fluids in bulk and to deliver fluids to components of the invention. In one set of embodiments, the maximum cross-sectional dimension of the channel(s) containing embodiments of the invention are less than 500 microns, less than 200 microns, less than 100 microns, less than 50 microns, or less than 25 microns. In some cases the dimensions of the channel may be chosen such that fluid is able to freely flow through the article or substrate. The dimensions of the channel may also be chosen, for example, to allow a certain volumetric or linear flowrate of fluid in the channel. Of course, the number of channels and the shape of the channels can be varied by any method known to those of ordinary skill in the art. In some cases, more than one channel or capillary may be used. For example, two or more channels may be used, where they are positioned inside each other, positioned adjacent to each other, positioned to intersect with each other, etc.
A “channel,” as used herein, means a feature on or in an article (substrate) that at least partially directs the flow of a fluid. The channel can have any cross-sectional shape (circular, oval, triangular, irregular, square or rectangular, or the like) and can be covered or uncovered. In embodiments where it is completely covered, at least one portion of the channel can have a cross-section that is completely enclosed, or the entire channel may be completely enclosed along its entire length with the exception of its inlet(s) and outlet(s). A channel may also have an aspect ratio (length to average cross sectional dimension) of at least 2:1, more typically at least 3:1, 5:1, or 10:1 or more. An open channel generally will include characteristics that facilitate control over fluid transport, e.g., structural characteristics (an elongated indentation) and/or physical or chemical characteristics (hydrophobicity vs. hydrophilicity) or other characteristics that can exert a force (e.g., a containing force) on a fluid. The fluid within the channel may partially or completely fill the channel. In some cases where an open channel is used, the fluid may be held within the channel, for example, using surface tension (i.e., a concave or convex meniscus).
The channels of the device may be hydrophilic or hydrophobic in order to minimize the surface free energy at the interface between a material that flows within the channel and the walls of the channel. For instance, if the formation of aqueous droplets in an oil is desired, the walls of the channel can be made hydrophobic. If the formation of oil droplets in an aqueous fluid is desired, the walls of the channels can be made hydrophilic.
In some cases, the device is fabricated using rapid prototyping and soft lithography. For example, a high resolution laser printer may be used to generate a mask from a CAD file that represents the channels that make up the fluidic network. The mask may be a transparency that may be contacted with a photoresist, for example, SU-8 photoresist (MicroChem), to produce a negative master of the photoresist on a silicon wafer. A positive replica of PDMS may be made by molding the PDMS against the master, a technique known to those skilled in the art. To complete the fluidic network, a flat substrate, e.g., a glass slide, silicon wafer, or a polystyrene surface, may be placed against the PDMS surface and plasma bonded together, or may be fixed to the PDMS using an adhesive. To allow for the introduction and receiving of fluids to and from the network, holes (for example 1 millimeter in diameter) may be formed in the PDMS by using an appropriately sized needle. To allow the fluidic network to communicate with a fluid source, tubing, for example of polyethylene, may be sealed in communication with the holes to form a fluidic connection. To prevent leakage, the connection may be sealed with a sealant or adhesive such as epoxy glue.
In order to optimize a device of the present invention, it may be helpful to quantify the diffusion constant and solubility of certain fluids through the semipermeable barrier, if these quantities are not already known. For instance, if the barrier is fabricated in PDMS, the flux of water through the barrier can be quantified by measuring transport rates of water as a function of barrier thickness. Micro fluidic devices can be built to have a well-defined planar geometries for which analytical solutions to the diffusion equation are easily calculated. For example, a microfluidic device can be fabricated having a 2 mm by 2 mm square barrier separating a water-filled chamber from a chamber through which dry air flows. The flux can be measured by placing colloids in the water and measuring the velocity of the colloids as a function of time. Analysis of the transient and steady-state flux allows determination of the diffusion constant and solubility of water in PDMS. Similar devices can be used to measure the solubility of oil in PDMS. In order to optimize the reversible dialysis process, the flux of water into and out of the protein solutions in the droplets can be determined (e.g., as a function of droplet volume, ionic strength of the fluids in the reservoir and/or droplet, type of carrier oil, and/or thickness of the barrier) using video optical microscopy by measuring the volume of the droplets as a function of time after changing the solution in the reservoir.
The present invention is not limited by the types of proteins that can be crystallized. Examples of types of proteins include bacterially-expressed recombinant membrane channel proteins, G protein-coupled receptors heterologously expressed in a mammalian cell culture systems, membrane-bound ATPase, and membrane proteins.
Microfluidic methods have been used to screen conditions for protein crystallization, but until now this method has been applied mainly to easily handled water-soluble proteins. A current challenge in structural biology is the crystallization and structure determination of integral membrane proteins. These are water-insoluble proteins that reside in the cell membrane and control the flows of molecules into and out of the cell. They are primary molecular players in such central biological phenomena as the generation of electrical impulses in the nervous system, “cell signaling,” i.e., the ability of cells to sense and respond to changes in environment, and the maintenance of organismal homeostasis parameters such as water and electrolyte balance, blood pressure, and cytoplasmic ATP levels. Despite their vast importance in maintaining cell function and viability, membrane proteins (which make up roughly 30% of proteins coded in the human genome) are under-represented in the structural database (which contains >104 water-soluble proteins and <102 membrane proteins). The reason for this scarcity is because it has been difficult to express membrane proteins in quantities large enough to permit crystallization trials, and even when such quantities are available, crystallization itself is not straight-forward.
Devices of the present invention may be used to exploit recent advances in membrane protein expression and crystallization strategies. For instance, some expression systems for prokaryotic homologues of neurobiologically important eukaryotic membrane proteins have been developed, and in a few cases these have been crystallized and structures determined by x-ray crystallography. In these cases, however, the rate-limiting step, is not the production of milligram-quantities of protein, but the screening of crystallization conditions. Membrane proteins must be crystallized from detergent solutions, and the choice and concentration of detergent have been found to be crucial additional parameters in finding conditions to form well-diffracting crystals. For this reason, a typical initial screen for a membrane protein requires systematic variation of 100-200 conditions. Sparse-matrix screens simply don't work because they are too sparse. Moreover, two additional constraints make the crystallization of membrane proteins more demanding than that of water-soluble proteins. First, the amounts of protein obtained in a typical membrane protein preparation, even in the best of cases, are much smaller than what is typically encountered in conventional water-soluble proteins (i.e., 1-10 mg rather than 50-500 mg). Second, membrane proteins are usually unstable in detergent and must be used in crystallization trials within hours of purification; they cannot be accumulated and stored. These constraints run directly against the requirement for large, systematic crystal screens.
Devices of the present invention may be used to overcome the constraints mentioned above for crystallizing membrane proteins. For example, device 2010, which can be used to perform reversible dialysis, may overcome the three limitations of membrane protein crystallization: the small amount of protein available, the short time available to handle the pure protein, and the very large number of conditions that must be tested to find suitable initial conditions for crystallization.
One of the challenges of crystallography is for the growth of extremely ordered and in some cases, large, crystals. Ordered and large crystals are suitable for ultra-high resolution data and for neutron diffraction data, respectively. These two methods are expected to provide the locations of protons, arguably the most important ions in enzymology, which are not accessible by conventional crystallography. So far, these applications have relied on serendipitous crystal formation rather than on controlled formation of crystals. Routine access of such ordered and/or large would make structural enzymology and its applications, e.g., drug design, more powerful than it is today. Certain embodiments of the current invention, with their ability to reversibly vary supersaturation, can be used to grow single crystals to large sizes, and the diffraction quality of these crystals can be characterized.
Although devices and methods of the present invention have been mainly described for crystallization, devices and methods of the invention may also be used for other types of concentration-dependent chemical processes. Non-limiting examples of such processes include chemical reactions, enzymatic reactions, immuno-based reactions (e.g., antigen-antibody), and cell-based reactions.
The following examples are intended to illustrate certain embodiments of the present invention, but are not to be construed as limiting and do not exemplify the full scope of the invention.
This example illustrates a procedure for fabricating a microfluidic structure used in certain embodiments of the invention. In one embodiment, a microfluidic structure comprising a series of microfluidic channels and microwells was made by applying a standard molding article against an appropriate master. For example, microchannels were made in PDMS by casting PDMS prepolymer (Sylgard 184, Dow Corning) onto a patterned photoresist surface relief (a master) generated by photolithography. The pattern of photoresist comprised the channels and microwells having the desired dimensions. After curing for 2 h at 65° C. in an oven, the polymer was removed from the master to give a free-standing PDMS mold with microchannels and microwells embossed on its surface. Inlets and/or outlets were cut out through the thickness of the PDMS slab using a modified borer.
A semi-permeable membrane (15 microns thick) formed in PDMS and comprising a reservoir and valve, as illustrated in
Next, the PDMS mold and PDMS membrane layer were sealed together by placing both pieces in a plasma oxidation chamber and oxidizing them for 1 minute. The PDMS mold was then placed onto the membrane layer with the surface relief in contact with the membrane layer. An irreversible seal formed as a result of the formation of bridging siloxane bonds (Si—O—Si) between the two substrates, caused by a condensation reaction between silanol (SiOH) groups that are present at both surfaces after plasma oxidation. After sealing, the membrane layer (with the attached PDMS mold) was removed from the master. The resulting structure was then placed against a support layer of PDMS. This example illustrates that a microfluidic structure comprising microchannels, microwells, reservoirs, and valves can be fabricated using simple lithographic procedures according to one embodiment of the invention.
This example shows the control of droplet size within microwells of a device. Experiments were performed using a microfluidic structure as generally illustrated in
Device 2026 of
Initially, all the droplets in
As shown in
Although water does dissolve slightly into the bulk of the PDMS microfluidic device and into the carrier oil, this experiment demonstrates that diffusion through the thin PDMS membrane is the dominant mechanism governing drop size, and not solubilization of the droplets in the carrier oil or in the bulk of the PDMS device.
Device 2010 comprised two layers. The upper layer comprised flow channels and microwells which contained the droplets of protein. The lower layer comprised five independent dialysis reservoirs and valves that controlled flow in the protein-containing channels of the upper layer. The two layers were separated by a 15 μm thick semi-permeable barrier 2150 made in PDMS. Square posts 2145 of PDMS covered 25% of the reservoir support the barrier.
Crystallization occurred when dry air was introduced into the reservoir (i.e., at a pressure of 15 psi), which caused water to flow from the protein solution across the barrier and into the reservoir. Once nucleated, the crystals grew to their final size in under 10 seconds. Over 90% of the wells were observed to contain crystals. Next, air in the reservoir was replaced with distilled water (i.e., pressurized at 15 psi). Diffusion of water into the droplet caused the volume of mother liquor surrounding the crystals to increase immediately (
The following example is a prophetic example.
While several embodiments of the present invention have been described and illustrated herein, those of ordinary skill in the art will readily envision a variety of other means and/or structures for performing the functions and/or obtaining the results and/or one or more of the advantages described herein, and each of such variations and/or modifications is deemed to be within the scope of the present invention. More generally, those skilled in the art will readily appreciate that all parameters, dimensions, materials, and configurations described herein are meant to be exemplary and that the actual parameters, dimensions, materials, and/or configurations will depend upon the specific application or applications for which the teachings of the present invention is/are used. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments of the invention described herein. It is, therefore, to be understood that the foregoing embodiments are presented by way of example only and that, within the scope of the appended claims and equivalents thereto, the invention may be practiced otherwise than as specifically described and claimed. The present invention is directed to each individual feature, system, article, material, kit, and/or method described herein. In addition, any combination of two or more such features, systems, articles, materials, kits, and/or methods, if such features, systems, articles, materials, kits, and/or methods are not mutually inconsistent, is included within the scope of the present invention.
All definitions, as defined and used herein, should be understood to control over dictionary definitions, definitions in documents incorporated by reference, and/or ordinary meanings of the defined terms.
The indefinite articles “a” and “an,” as used herein in the specification and in the claims, unless clearly indicated to the contrary, should be understood to mean “at least one.”
The phrase “and/or,” as used herein in the specification and in the claims, should be understood to mean “either or both” of the elements so conjoined, i.e., elements that are conjunctively present in some cases and disjunctively present in other cases. Multiple elements listed with “and/or” should be construed in the same fashion, i.e., “one or more” of the elements so conjoined. Other elements may optionally be present other than the elements specifically identified by the “and/or” clause, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, a reference to “A and/or B”, when used in conjunction with open-ended language such as “comprising” can refer, in one embodiment, to A only (optionally including elements other than B); in another embodiment, to B only (optionally including elements other than A); in yet another embodiment, to both A and B (optionally including other elements); etc.
As used herein in the specification and in the claims, “or” should be understood to have the same meaning as “and/or” as defined above. For example, when separating items in a list, “or” or “and/or” shall be interpreted as being inclusive, i.e., the inclusion of at least one, but also including more than one, of a number or list of elements, and, optionally, additional unlisted items. Only terms clearly indicated to the contrary, such as “only one of or “exactly one of,” or, when used in the claims, “consisting of,” will refer to the inclusion of exactly one element of a number or list of elements. In general, the term “or” as used herein shall only be interpreted as indicating exclusive alternatives (i.e. “one or the other but not both”) when preceded by terms of exclusivity, such as “either,” “one of,” “only one of,” or “exactly one of.” “Consisting essentially of, when used in the claims, shall have its ordinary meaning as used in the field of patent law.
As used herein in the specification and in the claims, the phrase “at least one,” in reference to a list of one or more elements, should be understood to mean at least one element selected from any one or more of the elements in the list of elements, but not necessarily including at least one of each and every element specifically listed within the list of elements and not excluding any combinations of elements in the list of elements. This definition also allows that elements may optionally be present other than the elements specifically identified within the list of elements to which the phrase “at least one” refers, whether related or unrelated to those elements specifically identified. Thus, as a non-limiting example, “at least one of A and B” (or, equivalently, “at least one of A or B,” or, equivalently “at least one of A and/or B”) can refer, in one embodiment, to at least one, optionally including more than one, A, with no B present (and optionally including elements other than B); in another embodiment, to at least one, optionally including more than one, B, with no A present (and optionally including elements other than A); in yet another embodiment, to at least one, optionally including more than one, A, and at least one, optionally including more than one, B (and optionally including other elements); etc.
It should also be understood that, unless clearly indicated to the contrary, in any methods claimed herein that include more than one step or act, the order of the steps or acts of the method is not necessarily limited to the order in which the steps or acts of the method are recited.
In the claims, as well as in the specification above, all transitional phrases such as “comprising,” “including,” “carrying,” “having,” “containing,” “involving,” “holding,” “composed of,” and the like are to be understood to be open-ended, i.e., to mean including but not limited to. Only the transitional phrases “consisting of and “consisting essentially of shall be closed or semi-closed transitional phrases, respectively, as set forth in the United States Patent Office Manual of Patent Examining Procedures, Section 2111.03.
This application is a continuation of U.S. application Ser. No. 12/525,749, filed Mar. 9, 2010, now U.S. Pat. No. 8,772,046, which is a U.S. National Stage filing of PCT/US2008/001544, filed Feb. 6, 2008, which claims priority to U.S. Provisional Application 60/899,849, filed Feb. 6, 2007, all of which are incorporated herein by reference in their entirety.
| Number | Name | Date | Kind |
|---|---|---|---|
| 2097692 | Fiegel | Nov 1937 | A |
| 2164172 | Dalton | Jun 1939 | A |
| 2656508 | Coulter | Oct 1953 | A |
| 2692800 | Nichols et al. | Oct 1954 | A |
| 2797149 | Skeggs | Jun 1957 | A |
| 2879141 | Skeggs | Mar 1959 | A |
| 2971700 | Peeps | Feb 1961 | A |
| 3479141 | Smythe et al. | Nov 1969 | A |
| 3608821 | Simm et al. | Sep 1971 | A |
| 3698635 | Sickles | Oct 1972 | A |
| 3816331 | Brown, Jr. et al. | Jun 1974 | A |
| 3930061 | Scharfenberger | Dec 1975 | A |
| 3960187 | Stock et al. | Jun 1976 | A |
| 3980541 | Aine | Sep 1976 | A |
| 3982541 | L'Esperance, Jr. | Sep 1976 | A |
| 4014469 | Sato | Mar 1977 | A |
| 4022575 | Hansen et al. | May 1977 | A |
| 4034966 | Suh et al. | Jul 1977 | A |
| 4059552 | Zweigle et al. | Nov 1977 | A |
| 4091042 | Alexanderson et al. | May 1978 | A |
| 4117550 | Folland et al. | Sep 1978 | A |
| 4130394 | Negersmith | Dec 1978 | A |
| 4210809 | Pelavin | Jul 1980 | A |
| 4253846 | Smythe et al. | Mar 1981 | A |
| 4266721 | Sickles | May 1981 | A |
| 4279345 | Allred | Jul 1981 | A |
| 4297345 | Howarth | Oct 1981 | A |
| 4315754 | Ruzicka et al. | Feb 1982 | A |
| 4378957 | Malkin et al. | Apr 1983 | A |
| 4383767 | Jido | May 1983 | A |
| 4439980 | Biblarz et al. | Apr 1984 | A |
| 4508265 | Jido | Apr 1985 | A |
| 4533634 | Maldonado et al. | Aug 1985 | A |
| 4585209 | Aine et al. | Apr 1986 | A |
| 4618476 | Columbus | Oct 1986 | A |
| 4628040 | Green | Dec 1986 | A |
| 4675285 | Clark et al. | Jun 1987 | A |
| 4676274 | Brown | Jun 1987 | A |
| 4683195 | Mullis et al. | Jul 1987 | A |
| 4683202 | Mullis | Jul 1987 | A |
| 4739044 | Stabinsky | Apr 1988 | A |
| 4757141 | Fung et al. | Jul 1988 | A |
| 4767515 | Scott et al. | Aug 1988 | A |
| 4767929 | Valentine | Aug 1988 | A |
| 4779805 | Jackson et al. | Oct 1988 | A |
| 4801086 | Noakes | Jan 1989 | A |
| 4801529 | Perlman | Jan 1989 | A |
| 4829996 | Noakes et al. | May 1989 | A |
| 4853336 | Saros et al. | Aug 1989 | A |
| 4859363 | Davis et al. | Aug 1989 | A |
| 4865444 | Green et al. | Sep 1989 | A |
| 4883750 | Whiteley et al. | Nov 1989 | A |
| 4908112 | Pace | Mar 1990 | A |
| 4931225 | Cheng | Jun 1990 | A |
| 4941959 | Scott | Jul 1990 | A |
| 4962885 | Coffee | Oct 1990 | A |
| 4963498 | Hillman et al. | Oct 1990 | A |
| 4981580 | Auer | Jan 1991 | A |
| 4996004 | Bucheler et al. | Feb 1991 | A |
| 5091652 | Mathies et al. | Feb 1992 | A |
| 5096615 | Prescott et al. | Mar 1992 | A |
| 5122360 | Harris et al. | Jun 1992 | A |
| 5180662 | Sitkovsky | Jan 1993 | A |
| 5185099 | Delpuech et al. | Feb 1993 | A |
| 5188290 | Gebauer et al. | Feb 1993 | A |
| 5188291 | Cross | Feb 1993 | A |
| 5192659 | Simons | Mar 1993 | A |
| 5204112 | Hope et al. | Apr 1993 | A |
| 5207973 | Harris et al. | May 1993 | A |
| 5241159 | Chatteriee et al. | Aug 1993 | A |
| 5260466 | McGibbon | Nov 1993 | A |
| 5262027 | Scott | Nov 1993 | A |
| 5270163 | Gold et al. | Dec 1993 | A |
| 5296375 | Kricka et al. | Mar 1994 | A |
| 5304487 | Wilding et al. | Apr 1994 | A |
| 5310653 | Hanausek-Walaszek et al. | May 1994 | A |
| 5313009 | Guenkel et al. | May 1994 | A |
| 5333675 | Mullis et al. | Aug 1994 | A |
| 5344594 | Sheridon | Sep 1994 | A |
| 5376252 | Ekstrom et al. | Dec 1994 | A |
| 5378957 | Kelly | Jan 1995 | A |
| 5397605 | Barbieri et al. | Mar 1995 | A |
| 5399461 | Van et al. | Mar 1995 | A |
| 5399491 | Kacian et al. | Mar 1995 | A |
| 5403617 | Haaland | Apr 1995 | A |
| 5413924 | Kosak et al. | May 1995 | A |
| 5417235 | Wise et al. | May 1995 | A |
| 5427946 | Kricka et al. | Jun 1995 | A |
| 5445934 | Fodor et al. | Aug 1995 | A |
| 5452878 | Gravesen et al. | Sep 1995 | A |
| 5452955 | Lundstrom | Sep 1995 | A |
| 5454472 | Benecke et al. | Oct 1995 | A |
| 5460945 | Springer et al. | Oct 1995 | A |
| 5468613 | Erlich et al. | Nov 1995 | A |
| 5475096 | Gold et al. | Dec 1995 | A |
| 5475610 | Atwood et al. | Dec 1995 | A |
| 5480614 | Kamahori | Jan 1996 | A |
| 5486335 | Wilding et al. | Jan 1996 | A |
| 5498392 | Wilding et al. | Mar 1996 | A |
| 5500415 | Dollat et al. | Mar 1996 | A |
| 5503851 | Mank et al. | Apr 1996 | A |
| 5512131 | Kumar et al. | Apr 1996 | A |
| 5516635 | Ekins et al. | May 1996 | A |
| 5518709 | Sutton et al. | May 1996 | A |
| 5523162 | Franz et al. | Jun 1996 | A |
| 5587128 | Wilding et al. | Dec 1996 | A |
| 5589136 | Northrup et al. | Dec 1996 | A |
| 5602756 | Atwood et al. | Feb 1997 | A |
| 5604097 | Brenner | Feb 1997 | A |
| 5610016 | Sato et al. | Mar 1997 | A |
| 5612188 | Shuler et al. | Mar 1997 | A |
| 5616478 | Chetverin et al. | Apr 1997 | A |
| 5617997 | Kobayashi et al. | Apr 1997 | A |
| 5635358 | Wilding et al. | Jun 1997 | A |
| 5636400 | Young | Jun 1997 | A |
| 5641658 | Adams et al. | Jun 1997 | A |
| 5643729 | Taniguchi et al. | Jul 1997 | A |
| 5655517 | Coffee | Aug 1997 | A |
| 5656155 | Norcross et al. | Aug 1997 | A |
| 5661222 | Hare | Aug 1997 | A |
| 5662874 | David | Sep 1997 | A |
| 5670325 | Lapidus et al. | Sep 1997 | A |
| 5681600 | Antinone et al. | Oct 1997 | A |
| 5695934 | Brenner | Dec 1997 | A |
| 5726026 | Wilding et al. | Mar 1998 | A |
| 5726404 | Brody | Mar 1998 | A |
| 5733526 | Trevino et al. | Mar 1998 | A |
| 5739036 | Parris | Apr 1998 | A |
| 5744366 | Kricka et al. | Apr 1998 | A |
| 5750988 | Apffel et al. | May 1998 | A |
| 5762775 | DePaoli et al. | Jun 1998 | A |
| 5779868 | Parce et al. | Jul 1998 | A |
| 5783431 | Peterson et al. | Jul 1998 | A |
| 5840506 | Giordano | Nov 1998 | A |
| 5846719 | Brenner et al. | Dec 1998 | A |
| 5849491 | Radomski et al. | Dec 1998 | A |
| 5858187 | Ramsey et al. | Jan 1999 | A |
| 5858655 | Arnold | Jan 1999 | A |
| 5858670 | Lam et al. | Jan 1999 | A |
| 5863722 | Brenner | Jan 1999 | A |
| 5868322 | Loucks, Jr. et al. | Feb 1999 | A |
| 5872010 | Karger et al. | Feb 1999 | A |
| 5876771 | Sizer et al. | Mar 1999 | A |
| 5880071 | Parce et al. | Mar 1999 | A |
| 5882680 | Suzuki et al. | Mar 1999 | A |
| 5882856 | Shuber | Mar 1999 | A |
| 5884846 | Tan | Mar 1999 | A |
| 5887755 | Hood, III | Mar 1999 | A |
| 5888746 | Tabiti et al. | Mar 1999 | A |
| 5888778 | Shuber | Mar 1999 | A |
| 5904933 | Riess et al. | May 1999 | A |
| 5921678 | Desai et al. | Jul 1999 | A |
| 5927852 | Serafin | Jul 1999 | A |
| 5928870 | Lapidus et al. | Jul 1999 | A |
| 5932100 | Yager et al. | Aug 1999 | A |
| 5935331 | Naka et al. | Aug 1999 | A |
| 5942056 | Singh | Aug 1999 | A |
| 5942443 | Parce et al. | Aug 1999 | A |
| 5958203 | Parce et al. | Sep 1999 | A |
| 5972187 | Parce et al. | Oct 1999 | A |
| 5980936 | Krafft et al. | Nov 1999 | A |
| 5989815 | Skolnick et al. | Nov 1999 | A |
| 5989892 | Nishimaki et al. | Nov 1999 | A |
| 5995341 | Tanaka et al. | Nov 1999 | A |
| 5997636 | Gamarnik et al. | Dec 1999 | A |
| 6008003 | Haak-Frendscho et al. | Dec 1999 | A |
| 6023540 | Walt et al. | Feb 2000 | A |
| 6028066 | Unger | Feb 2000 | A |
| 6042709 | Parce et al. | Mar 2000 | A |
| 6045755 | Lebl et al. | Apr 2000 | A |
| 6046056 | Parce et al. | Apr 2000 | A |
| 6048551 | Hilfinger et al. | Apr 2000 | A |
| 6068199 | Coffee | May 2000 | A |
| 6074879 | Zelmanovic et al. | Jun 2000 | A |
| 6080295 | Parce et al. | Jun 2000 | A |
| 6086740 | Kennedy | Jul 2000 | A |
| 6096495 | Kasai et al. | Aug 2000 | A |
| 6103537 | Ullman et al. | Aug 2000 | A |
| 6105571 | Coffee | Aug 2000 | A |
| 6105877 | Coffee | Aug 2000 | A |
| 6107059 | Hart | Aug 2000 | A |
| 6116516 | Ganan-Calvo | Sep 2000 | A |
| 6118849 | Tanimori et al. | Sep 2000 | A |
| 6119953 | Ganan-Calvo et al. | Sep 2000 | A |
| 6120666 | Jacobson et al. | Sep 2000 | A |
| 6124388 | Takai et al. | Sep 2000 | A |
| 6124439 | Friedman et al. | Sep 2000 | A |
| 6130052 | Van Baren et al. | Oct 2000 | A |
| 6130098 | Handique et al. | Oct 2000 | A |
| 6137214 | Raina | Oct 2000 | A |
| 6138077 | Brenner | Oct 2000 | A |
| 6139303 | Reed et al. | Oct 2000 | A |
| 6140053 | Koster | Oct 2000 | A |
| 6143496 | Brown et al. | Nov 2000 | A |
| 6146828 | Lapidus et al. | Nov 2000 | A |
| 6149789 | Benecke et al. | Nov 2000 | A |
| 6150180 | Parce et al. | Nov 2000 | A |
| 6150516 | Brenner et al. | Nov 2000 | A |
| 6165778 | Kedar | Dec 2000 | A |
| 6171796 | An et al. | Jan 2001 | B1 |
| 6171850 | Nagle et al. | Jan 2001 | B1 |
| 6172214 | Brenner | Jan 2001 | B1 |
| 6172218 | Brenner | Jan 2001 | B1 |
| 6174160 | Lee et al. | Jan 2001 | B1 |
| 6174469 | Ganan-Calvo | Jan 2001 | B1 |
| 6180372 | Franzen | Jan 2001 | B1 |
| 6184012 | Neri et al. | Feb 2001 | B1 |
| 6187214 | Ganan-Calvo | Feb 2001 | B1 |
| 6189803 | Ganan-Calvo | Feb 2001 | B1 |
| 6196525 | Ganan-Calvo | Mar 2001 | B1 |
| 6197335 | Sherman | Mar 2001 | B1 |
| 6197835 | Ganan-Calvo | Mar 2001 | B1 |
| 6203993 | Shuber et al. | Mar 2001 | B1 |
| 6207372 | Shuber | Mar 2001 | B1 |
| 6210396 | MacDonald et al. | Apr 2001 | B1 |
| 6210891 | Nyren et al. | Apr 2001 | B1 |
| 6210896 | Chan | Apr 2001 | B1 |
| 6214558 | Shuber et al. | Apr 2001 | B1 |
| 6221654 | Quake et al. | Apr 2001 | B1 |
| 6227466 | Hartman et al. | May 2001 | B1 |
| 6234402 | Ganan-Calvo | May 2001 | B1 |
| 6235383 | Hong et al. | May 2001 | B1 |
| 6235475 | Brenner et al. | May 2001 | B1 |
| 6241159 | Ganan-Calvo et al. | Jun 2001 | B1 |
| 6243373 | Turock | Jun 2001 | B1 |
| 6248378 | Ganan-Calvo | Jun 2001 | B1 |
| 6251661 | Urabe et al. | Jun 2001 | B1 |
| 6252129 | Coffee | Jun 2001 | B1 |
| 6258568 | Nyren | Jul 2001 | B1 |
| 6258858 | Nakajima et al. | Jul 2001 | B1 |
| 6263222 | Diab et al. | Jul 2001 | B1 |
| 6266459 | Walt et al. | Jul 2001 | B1 |
| 6267353 | Friedline et al. | Jul 2001 | B1 |
| 6267858 | Parce et al. | Jul 2001 | B1 |
| 6268165 | O'Brien | Jul 2001 | B1 |
| 6268222 | Chandler et al. | Jul 2001 | B1 |
| 6274320 | Rothberg et al. | Aug 2001 | B1 |
| 6274337 | Parce et al. | Aug 2001 | B1 |
| 6294344 | O'Brien | Sep 2001 | B1 |
| 6296673 | Santarsiero et al. | Oct 2001 | B1 |
| 6299145 | Ganan-Calvo | Oct 2001 | B1 |
| 6301055 | Legrand et al. | Oct 2001 | B1 |
| 6306659 | Parce et al. | Oct 2001 | B1 |
| 6310354 | Hanninen et al. | Oct 2001 | B1 |
| 6310653 | Malcolm, Jr. et al. | Oct 2001 | B1 |
| 6316208 | Roberts et al. | Nov 2001 | B1 |
| 6316213 | O'Brien | Nov 2001 | B1 |
| 6318640 | Coffee | Nov 2001 | B1 |
| 6336463 | Ohta | Jan 2002 | B1 |
| 6344325 | Quake et al. | Feb 2002 | B1 |
| 6352828 | Brenner | Mar 2002 | B1 |
| 6355193 | Stott | Mar 2002 | B1 |
| 6355198 | Kim et al. | Mar 2002 | B1 |
| 6357670 | Ganan-Calvo | Mar 2002 | B2 |
| 6386463 | Ganan-Calvo | May 2002 | B1 |
| 6391559 | Brown et al. | May 2002 | B1 |
| 6394429 | Ganan-Calvo | May 2002 | B2 |
| 6399339 | Wolberg et al. | Jun 2002 | B1 |
| 6399389 | Parce et al. | Jun 2002 | B1 |
| 6403373 | Scanlan et al. | Jun 2002 | B1 |
| 6405936 | Ganan-Calvo | Jun 2002 | B1 |
| 6408878 | Unger et al. | Jun 2002 | B2 |
| 6409832 | Weigl et al. | Jun 2002 | B2 |
| 6429025 | Parce et al. | Aug 2002 | B1 |
| 6429148 | Chu et al. | Aug 2002 | B1 |
| 6432143 | Kubiak et al. | Aug 2002 | B2 |
| 6432148 | Ganan-Calvo | Aug 2002 | B1 |
| 6432630 | Blankenstein | Aug 2002 | B1 |
| 6439103 | Miller | Aug 2002 | B1 |
| 6440706 | Vogelstein et al. | Aug 2002 | B1 |
| 6450139 | Watanabe | Sep 2002 | B1 |
| 6450189 | Ganan-Calvo | Sep 2002 | B1 |
| 6454193 | Busick et al. | Sep 2002 | B1 |
| 6464336 | Sharma | Oct 2002 | B1 |
| 6464886 | Ganan-Calvo | Oct 2002 | B2 |
| 6475441 | Parce et al. | Nov 2002 | B1 |
| 6481648 | Zimmermann | Nov 2002 | B1 |
| 6489103 | Griffiths et al. | Dec 2002 | B1 |
| 6503933 | Moloney et al. | Jan 2003 | B1 |
| 6506609 | Wada et al. | Jan 2003 | B1 |
| 6508988 | Van Dam et al. | Jan 2003 | B1 |
| 6520425 | Reneker | Feb 2003 | B1 |
| 6524456 | Ramsey et al. | Feb 2003 | B1 |
| 6540395 | Muhlbauer et al. | Apr 2003 | B2 |
| 6540895 | Spence et al. | Apr 2003 | B1 |
| 6551836 | Chow et al. | Apr 2003 | B1 |
| 6553944 | Allen et al. | Apr 2003 | B1 |
| 6553960 | Yoshikawa et al. | Apr 2003 | B1 |
| 6554202 | Ganan-Calvo | Apr 2003 | B2 |
| 6557334 | Jager | May 2003 | B2 |
| 6557834 | Ganon-Calvo | May 2003 | B2 |
| 6558944 | Parce et al. | May 2003 | B1 |
| 6558960 | Parce et al. | May 2003 | B1 |
| 6560030 | Legrand et al. | May 2003 | B2 |
| 6565010 | Anderson et al. | May 2003 | B2 |
| 6569631 | Pantoliano et al. | May 2003 | B1 |
| 6576420 | Carson et al. | Jun 2003 | B1 |
| 6591852 | McNeely et al. | Jul 2003 | B1 |
| 6592321 | Bonker et al. | Jul 2003 | B2 |
| 6592821 | Wada et al. | Jul 2003 | B1 |
| 6608726 | Legrand et al. | Aug 2003 | B2 |
| 6610499 | Fulwyler et al. | Aug 2003 | B1 |
| 6614598 | Quake et al. | Sep 2003 | B1 |
| 6627603 | Bibette et al. | Sep 2003 | B1 |
| 6630006 | Santarsiero et al. | Oct 2003 | B2 |
| 6630353 | Parce et al. | Oct 2003 | B1 |
| 6632619 | Harrison et al. | Oct 2003 | B1 |
| 6638749 | Beckman et al. | Oct 2003 | B1 |
| 6645432 | Anderson et al. | Nov 2003 | B1 |
| 6646253 | Rohwer et al. | Nov 2003 | B1 |
| 6653626 | Fischer et al. | Nov 2003 | B2 |
| 6656267 | Newman | Dec 2003 | B2 |
| 6659370 | Inoue | Dec 2003 | B1 |
| 6660252 | Matathia et al. | Dec 2003 | B2 |
| 6670142 | Lau et al. | Dec 2003 | B2 |
| 6679441 | Borra et al. | Jan 2004 | B1 |
| 6680178 | Harris et al. | Jan 2004 | B2 |
| 6682890 | Mack et al. | Jan 2004 | B2 |
| 6717136 | Andersson et al. | Apr 2004 | B2 |
| 6729561 | Hirae et al. | May 2004 | B2 |
| 6739036 | Koike et al. | May 2004 | B2 |
| 6744046 | Valaskovic et al. | Jun 2004 | B2 |
| 6752922 | Huang et al. | Jun 2004 | B2 |
| 6753147 | Vogelstein et al. | Jun 2004 | B2 |
| 6766817 | da Silva | Jul 2004 | B2 |
| 6767194 | Jeon et al. | Jul 2004 | B2 |
| 6767704 | Waldman et al. | Jul 2004 | B2 |
| 6790328 | Jacobson et al. | Sep 2004 | B2 |
| 6793753 | Unger et al. | Sep 2004 | B2 |
| 6797056 | David | Sep 2004 | B2 |
| 6800849 | Staats | Oct 2004 | B2 |
| 6806058 | Jesperson et al. | Oct 2004 | B2 |
| 6808382 | Lanfranchi | Oct 2004 | B2 |
| 6808882 | Griffiths et al. | Oct 2004 | B2 |
| 6814980 | Levy et al. | Nov 2004 | B2 |
| 6818395 | Quake et al. | Nov 2004 | B1 |
| 6832787 | Renzi | Dec 2004 | B1 |
| 6833242 | Quake et al. | Dec 2004 | B2 |
| 6841350 | Ogden et al. | Jan 2005 | B2 |
| 6872250 | David et al. | Mar 2005 | B2 |
| 6890487 | Sklar et al. | May 2005 | B1 |
| 6897018 | Yuan et al. | May 2005 | B1 |
| 6905844 | Kim | Jun 2005 | B2 |
| 6918404 | Dias da Silva | Jul 2005 | B2 |
| 6926313 | Renzi | Aug 2005 | B1 |
| 6935768 | Lowe et al. | Aug 2005 | B2 |
| 6936417 | Orntoft | Aug 2005 | B2 |
| 6942978 | O'Brien | Sep 2005 | B1 |
| 6949342 | Golub et al. | Sep 2005 | B2 |
| 6960437 | Enzelberger et al. | Nov 2005 | B2 |
| 6974667 | Horne et al. | Dec 2005 | B2 |
| 6998232 | Feinstein et al. | Feb 2006 | B1 |
| 7022472 | Robbins et al. | Apr 2006 | B2 |
| 7041481 | Anderson et al. | May 2006 | B2 |
| 7049072 | Seshi | May 2006 | B2 |
| 7056674 | Baker et al. | Jun 2006 | B2 |
| 7057026 | Barnes et al. | Jun 2006 | B2 |
| 7066586 | da Silva | Jun 2006 | B2 |
| 7068874 | Wang et al. | Jun 2006 | B2 |
| 7078180 | Genetta | Jul 2006 | B2 |
| 7081192 | Wang et al. | Jul 2006 | B1 |
| 7081340 | Baker et al. | Jul 2006 | B2 |
| 7090983 | Muramatsu et al. | Aug 2006 | B1 |
| 7115230 | Sundararajan et al. | Oct 2006 | B2 |
| 7118910 | Unger et al. | Oct 2006 | B2 |
| 7129091 | Ismagilov et al. | Oct 2006 | B2 |
| 7138233 | Griffiths et al. | Nov 2006 | B2 |
| 7153700 | Pardee et al. | Dec 2006 | B1 |
| 7156917 | Moriyama et al. | Jan 2007 | B2 |
| 7163801 | Reed | Jan 2007 | B2 |
| 7169560 | Lapidus et al. | Jan 2007 | B2 |
| 7171311 | Dai et al. | Jan 2007 | B2 |
| 7198899 | Schleyer et al. | Apr 2007 | B2 |
| 7204431 | Li et al. | Apr 2007 | B2 |
| 7229770 | Price et al. | Jun 2007 | B1 |
| 7252943 | Griffiths et al. | Aug 2007 | B2 |
| 7267938 | Anderson et al. | Sep 2007 | B2 |
| 7268167 | Higuchi et al. | Sep 2007 | B2 |
| 7282337 | Harris | Oct 2007 | B1 |
| 7291462 | O'Brien et al. | Nov 2007 | B2 |
| 7294503 | Quake et al. | Nov 2007 | B2 |
| 7300765 | Patel | Nov 2007 | B2 |
| 7308364 | Shaughnessy et al. | Dec 2007 | B2 |
| 7314721 | Gure et al. | Jan 2008 | B2 |
| 7316906 | Chiorazzi et al. | Jan 2008 | B2 |
| 7326529 | Ali et al. | Feb 2008 | B2 |
| 7332280 | Levy et al. | Feb 2008 | B2 |
| 7332590 | Nacht et al. | Feb 2008 | B2 |
| 7341211 | Ganan Calvo et al. | Mar 2008 | B2 |
| 7348142 | Wang | Mar 2008 | B2 |
| 7358231 | McCaffey et al. | Apr 2008 | B1 |
| 7361474 | Siegler | Apr 2008 | B2 |
| 7364862 | Ali et al. | Apr 2008 | B2 |
| 7368255 | Bae et al. | May 2008 | B2 |
| 7378233 | Sidransky et al. | May 2008 | B2 |
| 7378280 | Quake et al. | May 2008 | B2 |
| 7390463 | He et al. | Jun 2008 | B2 |
| 7393665 | Brenner | Jul 2008 | B2 |
| 7416851 | Davi et al. | Aug 2008 | B2 |
| 7429467 | Holliger et al. | Sep 2008 | B2 |
| 7432064 | Salceda et al. | Oct 2008 | B2 |
| 7442507 | Polsky et al. | Oct 2008 | B2 |
| 7449303 | Coignet | Nov 2008 | B2 |
| 7468271 | Golovchenko et al. | Dec 2008 | B2 |
| 7473530 | Huttemann | Jan 2009 | B2 |
| 7473531 | Domon et al. | Jan 2009 | B1 |
| 7476506 | Schleyer et al. | Jan 2009 | B2 |
| 7479370 | Coignet | Jan 2009 | B2 |
| 7479371 | Ando et al. | Jan 2009 | B2 |
| 7479376 | Waldman et al. | Jan 2009 | B2 |
| 7482129 | Soyupak et al. | Jan 2009 | B2 |
| 7501244 | Reinhard et al. | Mar 2009 | B2 |
| 7504214 | Erlander et al. | Mar 2009 | B2 |
| 7507532 | Chang et al. | Mar 2009 | B2 |
| 7507541 | Raitano et al. | Mar 2009 | B2 |
| 7510707 | Platica et al. | Mar 2009 | B2 |
| 7510842 | Podust et al. | Mar 2009 | B2 |
| 7514209 | Dai et al. | Apr 2009 | B2 |
| 7514210 | Holliger et al. | Apr 2009 | B2 |
| 7524633 | Sidransky | Apr 2009 | B2 |
| 7527933 | Sahin et al. | May 2009 | B2 |
| 7537897 | Brenner et al. | May 2009 | B2 |
| 7541383 | Fu et al. | Jun 2009 | B2 |
| 7544473 | Brenner | Jun 2009 | B2 |
| 7556776 | Fraden et al. | Jul 2009 | B2 |
| 7582446 | Griffiths et al. | Sep 2009 | B2 |
| 7622081 | Chou et al. | Nov 2009 | B2 |
| 7632562 | Nair et al. | Dec 2009 | B2 |
| 7635562 | Harris et al. | Dec 2009 | B2 |
| 7638276 | Griffiths et al. | Dec 2009 | B2 |
| 7655435 | Holliger et al. | Feb 2010 | B2 |
| 7655470 | Ismagilov et al. | Feb 2010 | B2 |
| 7666593 | Lapidus | Feb 2010 | B2 |
| 7678565 | Schurmann-Mader et al. | Mar 2010 | B2 |
| 7691576 | Holliger et al. | Apr 2010 | B2 |
| 7698287 | Becker et al. | Apr 2010 | B2 |
| 7708949 | Stone et al. | May 2010 | B2 |
| 7718578 | Griffiths et al. | May 2010 | B2 |
| 7736890 | Sia et al. | Jun 2010 | B2 |
| 7741130 | Lee, Jr. et al. | Jun 2010 | B2 |
| 7814175 | Chang et al. | Oct 2010 | B1 |
| 7824889 | Vogelstein et al. | Nov 2010 | B2 |
| 7897044 | Hoyos et al. | Mar 2011 | B2 |
| 7897341 | Griffiths et al. | Mar 2011 | B2 |
| 7901939 | Ismagliov et al. | Mar 2011 | B2 |
| 7915015 | Vogelstein et al. | Mar 2011 | B2 |
| 7968287 | Griffiths et al. | Jun 2011 | B2 |
| 7990525 | Kanda | Aug 2011 | B2 |
| 8012382 | Kim et al. | Sep 2011 | B2 |
| 8067159 | Brown et al. | Nov 2011 | B2 |
| 8153402 | Holliger et al. | Apr 2012 | B2 |
| 8257925 | Brown et al. | Sep 2012 | B2 |
| 8278071 | Brown et al. | Oct 2012 | B2 |
| 8436993 | Kaduchak et al. | May 2013 | B2 |
| 20010010338 | Ganan-Calvo | Aug 2001 | A1 |
| 20010020011 | Mathiowitz et al. | Sep 2001 | A1 |
| 20010023078 | Bawendi et al. | Sep 2001 | A1 |
| 20010029983 | Unger et al. | Oct 2001 | A1 |
| 20010034031 | Short et al. | Oct 2001 | A1 |
| 20010041343 | Pankowsky | Nov 2001 | A1 |
| 20010041344 | Sepetov et al. | Nov 2001 | A1 |
| 20010042793 | Ganan-Calvo | Nov 2001 | A1 |
| 20010048900 | Bardell et al. | Dec 2001 | A1 |
| 20010050881 | Depaoli et al. | Dec 2001 | A1 |
| 20020004532 | Matathia et al. | Jan 2002 | A1 |
| 20020005354 | Spence et al. | Jan 2002 | A1 |
| 20020008028 | Jacobson et al. | Jan 2002 | A1 |
| 20020012971 | Mehta | Jan 2002 | A1 |
| 20020022038 | Biatry et al. | Feb 2002 | A1 |
| 20020022261 | Anderson et al. | Feb 2002 | A1 |
| 20020033422 | Ganan-Calvo | Mar 2002 | A1 |
| 20020036139 | Becker et al. | Mar 2002 | A1 |
| 20020058332 | Quake et al. | May 2002 | A1 |
| 20020067800 | Newman et al. | Jun 2002 | A1 |
| 20020119459 | Griffiths | Aug 2002 | A1 |
| 20020143437 | Handique et al. | Oct 2002 | A1 |
| 20020155080 | Glenn et al. | Oct 2002 | A1 |
| 20020158027 | Moon et al. | Oct 2002 | A1 |
| 20020164271 | Ho | Nov 2002 | A1 |
| 20020164629 | Quake et al. | Nov 2002 | A1 |
| 20030012586 | Iwata et al. | Jan 2003 | A1 |
| 20030015425 | Bohm et al. | Jan 2003 | A1 |
| 20030017579 | Corn et al. | Jan 2003 | A1 |
| 20030039169 | Ehrfeld et al. | Feb 2003 | A1 |
| 20030059764 | Ravkin et al. | Mar 2003 | A1 |
| 20030061687 | Hansen et al. | Apr 2003 | A1 |
| 20030064414 | Benecky et al. | Apr 2003 | A1 |
| 20030082795 | Shuler et al. | May 2003 | A1 |
| 20030124586 | Griffiths et al. | Jul 2003 | A1 |
| 20030144260 | Gilon | Jul 2003 | A1 |
| 20030148544 | Nie et al. | Aug 2003 | A1 |
| 20030183525 | Elrod et al. | Oct 2003 | A1 |
| 20030224509 | Moon et al. | Dec 2003 | A1 |
| 20030229376 | Sandhu | Dec 2003 | A1 |
| 20030230486 | Chien et al. | Dec 2003 | A1 |
| 20030232356 | Dooley et al. | Dec 2003 | A1 |
| 20040005582 | Shipwash | Jan 2004 | A1 |
| 20040005594 | Holliger et al. | Jan 2004 | A1 |
| 20040018525 | Wirtz et al. | Jan 2004 | A1 |
| 20040027915 | Lowe et al. | Feb 2004 | A1 |
| 20040037813 | Simpson et al. | Feb 2004 | A1 |
| 20040041093 | Schultz et al. | Mar 2004 | A1 |
| 20040050946 | Wang et al. | Mar 2004 | A1 |
| 20040053247 | Cordon-Cardo et al. | Mar 2004 | A1 |
| 20040068019 | Higuchi et al. | Apr 2004 | A1 |
| 20040069632 | Ripoll | Apr 2004 | A1 |
| 20040071781 | Chattopadhyay et al. | Apr 2004 | A1 |
| 20040079881 | Fischer et al. | Apr 2004 | A1 |
| 20040096515 | Bausch et al. | May 2004 | A1 |
| 20040115224 | Ohno | Jun 2004 | A1 |
| 20040134854 | Higuchi et al. | Jul 2004 | A1 |
| 20040136497 | Meldrum et al. | Jul 2004 | A1 |
| 20040146921 | Eveleigh et al. | Jul 2004 | A1 |
| 20040159633 | Whitesides et al. | Aug 2004 | A1 |
| 20040181131 | Maynard et al. | Sep 2004 | A1 |
| 20040181343 | Wigstrom et al. | Sep 2004 | A1 |
| 20040182712 | Basol | Sep 2004 | A1 |
| 20040188254 | Spaid | Sep 2004 | A1 |
| 20040224419 | Zheng et al. | Nov 2004 | A1 |
| 20040253731 | Holliger et al. | Dec 2004 | A1 |
| 20040258203 | Yamano et al. | Dec 2004 | A1 |
| 20050032238 | Karp et al. | Feb 2005 | A1 |
| 20050032240 | Lee et al. | Feb 2005 | A1 |
| 20050037392 | Griffiths et al. | Feb 2005 | A1 |
| 20050042648 | Griffiths et al. | Feb 2005 | A1 |
| 20050048467 | Sastry et al. | Mar 2005 | A1 |
| 20050064460 | Holliger et al. | Mar 2005 | A1 |
| 20050069920 | Griffiths et al. | Mar 2005 | A1 |
| 20050079510 | Berka et al. | Apr 2005 | A1 |
| 20050084923 | Mueller et al. | Apr 2005 | A1 |
| 20050087122 | Ismagliov et al. | Apr 2005 | A1 |
| 20050095611 | Chan et al. | May 2005 | A1 |
| 20050100895 | Waldman et al. | May 2005 | A1 |
| 20050103690 | Kawano et al. | May 2005 | A1 |
| 20050129582 | Breidford et al. | Jun 2005 | A1 |
| 20050152908 | Liew et al. | Jul 2005 | A1 |
| 20050164239 | Griffiths et al. | Jul 2005 | A1 |
| 20050170431 | Ibrahim et al. | Aug 2005 | A1 |
| 20050172476 | Stone et al. | Aug 2005 | A1 |
| 20050183995 | Deshpande et al. | Aug 2005 | A1 |
| 20050207940 | Butler et al. | Sep 2005 | A1 |
| 20050221339 | Griffiths et al. | Oct 2005 | A1 |
| 20050226742 | Unger et al. | Oct 2005 | A1 |
| 20050227264 | Nobile et al. | Oct 2005 | A1 |
| 20050248066 | Esteban | Nov 2005 | A1 |
| 20050260566 | Fischer et al. | Nov 2005 | A1 |
| 20050272159 | Ismagilov et al. | Dec 2005 | A1 |
| 20060003347 | Griffiths et al. | Jan 2006 | A1 |
| 20060003429 | Frost et al. | Jan 2006 | A1 |
| 20060003439 | Ismagilov et al. | Jan 2006 | A1 |
| 20060036348 | Handique et al. | Feb 2006 | A1 |
| 20060046257 | Pollock et al. | Mar 2006 | A1 |
| 20060051329 | Lee et al. | Mar 2006 | A1 |
| 20060078888 | Griffiths et al. | Apr 2006 | A1 |
| 20060078893 | Griffiths et al. | Apr 2006 | A1 |
| 20060094119 | Ismagilov et al. | May 2006 | A1 |
| 20060108012 | Barrow et al. | May 2006 | A1 |
| 20060110759 | Paris et al. | May 2006 | A1 |
| 20060115821 | Einstein et al. | Jun 2006 | A1 |
| 20060147909 | Rarbach et al. | Jul 2006 | A1 |
| 20060153924 | Griffiths et al. | Jul 2006 | A1 |
| 20060154298 | Griffiths et al. | Jul 2006 | A1 |
| 20060160762 | Zetter et al. | Jul 2006 | A1 |
| 20060163385 | Link et al. | Jul 2006 | A1 |
| 20060169800 | Rosell et al. | Aug 2006 | A1 |
| 20060195269 | Yeatman et al. | Aug 2006 | A1 |
| 20060223127 | Yip et al. | Oct 2006 | A1 |
| 20060234254 | An et al. | Oct 2006 | A1 |
| 20060234259 | Rubin et al. | Oct 2006 | A1 |
| 20060252057 | Raponi et al. | Nov 2006 | A1 |
| 20060258841 | Michl et al. | Nov 2006 | A1 |
| 20060263888 | Fritz et al. | Nov 2006 | A1 |
| 20060269558 | Murphy et al. | Nov 2006 | A1 |
| 20060269971 | Diamandis | Nov 2006 | A1 |
| 20060281089 | Gibson et al. | Dec 2006 | A1 |
| 20070003442 | Link et al. | Jan 2007 | A1 |
| 20070026439 | Faulstich et al. | Feb 2007 | A1 |
| 20070053896 | Ahmed et al. | Mar 2007 | A1 |
| 20070054119 | Garstecki et al. | Mar 2007 | A1 |
| 20070056853 | Aizenberg et al. | Mar 2007 | A1 |
| 20070077572 | Tawfik et al. | Apr 2007 | A1 |
| 20070077579 | Griffiths et al. | Apr 2007 | A1 |
| 20070092914 | Griffiths et al. | Apr 2007 | A1 |
| 20070120899 | Ohnishi et al. | May 2007 | A1 |
| 20070154889 | Wang | Jul 2007 | A1 |
| 20070166705 | Milton et al. | Jul 2007 | A1 |
| 20070184439 | Guilford et al. | Aug 2007 | A1 |
| 20070184489 | Griffiths et al. | Aug 2007 | A1 |
| 20070195127 | Ahn et al. | Aug 2007 | A1 |
| 20070259351 | Chinitz et al. | Nov 2007 | A1 |
| 20070259368 | An et al. | Nov 2007 | A1 |
| 20070259374 | Griffiths et al. | Nov 2007 | A1 |
| 20070292869 | Becker et al. | Dec 2007 | A1 |
| 20080003142 | Link et al. | Jan 2008 | A1 |
| 20080009005 | Kruk | Jan 2008 | A1 |
| 20080014589 | Link et al. | Jan 2008 | A1 |
| 20080014590 | Dahary et al. | Jan 2008 | A1 |
| 20080020940 | Stedronsky et al. | Jan 2008 | A1 |
| 20080021330 | Hwang et al. | Jan 2008 | A1 |
| 20080023330 | Viovy et al. | Jan 2008 | A1 |
| 20080038754 | Farias-Eisner et al. | Feb 2008 | A1 |
| 20080044828 | Kwok | Feb 2008 | A1 |
| 20080050378 | Nakamura et al. | Feb 2008 | A1 |
| 20080050723 | Belacel et al. | Feb 2008 | A1 |
| 20080053205 | Pollack et al. | Mar 2008 | A1 |
| 20080057514 | Goldenring | Mar 2008 | A1 |
| 20080058432 | Wang et al. | Mar 2008 | A1 |
| 20080063227 | Rohrseitz | Mar 2008 | A1 |
| 20080064047 | Zetter et al. | Mar 2008 | A1 |
| 20080081330 | Kahvejian | Apr 2008 | A1 |
| 20080081333 | Mori et al. | Apr 2008 | A1 |
| 20080092973 | Lai | Apr 2008 | A1 |
| 20080113340 | Schlegel | May 2008 | A1 |
| 20080118462 | Alani et al. | May 2008 | A1 |
| 20080138806 | Chow et al. | Jun 2008 | A1 |
| 20080166772 | Hollinger et al. | Jul 2008 | A1 |
| 20080171078 | Gray | Jul 2008 | A1 |
| 20080176211 | Spence et al. | Jul 2008 | A1 |
| 20080176236 | Tsao et al. | Jul 2008 | A1 |
| 20080181850 | Thaxton et al. | Jul 2008 | A1 |
| 20080206756 | Lee et al. | Aug 2008 | A1 |
| 20080222741 | Chinnaiyan | Sep 2008 | A1 |
| 20080234138 | Shaughnessy et al. | Sep 2008 | A1 |
| 20080234139 | Shaughnessy et al. | Sep 2008 | A1 |
| 20080268473 | Moses et al. | Oct 2008 | A1 |
| 20080269157 | Srivastava et al. | Oct 2008 | A1 |
| 20080274908 | Chang | Nov 2008 | A1 |
| 20080280302 | Kebebew | Nov 2008 | A1 |
| 20080286199 | Livingston et al. | Nov 2008 | A1 |
| 20080286801 | Arjol et al. | Nov 2008 | A1 |
| 20080286811 | Moses et al. | Nov 2008 | A1 |
| 20080293578 | Shaugnessy et al. | Nov 2008 | A1 |
| 20080311570 | Lai | Dec 2008 | A1 |
| 20080311604 | Elting et al. | Dec 2008 | A1 |
| 20090004687 | Mansfield et al. | Jan 2009 | A1 |
| 20090005254 | Griffiths et al. | Jan 2009 | A1 |
| 20090012187 | Chu et al. | Jan 2009 | A1 |
| 20090017463 | Bhowmick | Jan 2009 | A1 |
| 20090021728 | Heinz et al. | Jan 2009 | A1 |
| 20090023137 | Van Der Zee et al. | Jan 2009 | A1 |
| 20090026082 | Rothberg et al. | Jan 2009 | A1 |
| 20090029372 | Wewer | Jan 2009 | A1 |
| 20090042737 | Katz et al. | Feb 2009 | A1 |
| 20090053700 | Griffiths et al. | Feb 2009 | A1 |
| 20090053732 | Vermesh et al. | Feb 2009 | A1 |
| 20090060797 | Mathies et al. | Mar 2009 | A1 |
| 20090062144 | Guo | Mar 2009 | A1 |
| 20090068170 | Weitz et al. | Mar 2009 | A1 |
| 20090075265 | Budiman et al. | Mar 2009 | A1 |
| 20090075307 | Fischer et al. | Mar 2009 | A1 |
| 20090075311 | Karl | Mar 2009 | A1 |
| 20090081237 | D'Andrea et al. | Mar 2009 | A1 |
| 20090081685 | Beyer et al. | Mar 2009 | A1 |
| 20090087849 | Malinowski et al. | Apr 2009 | A1 |
| 20090092973 | Erlander et al. | Apr 2009 | A1 |
| 20090098542 | Budiman et al. | Apr 2009 | A1 |
| 20090098543 | Budiman et al. | Apr 2009 | A1 |
| 20090118128 | Liu et al. | May 2009 | A1 |
| 20090124569 | Bergan et al. | May 2009 | A1 |
| 20090127454 | Ritchie et al. | May 2009 | A1 |
| 20090127589 | Rothberg et al. | May 2009 | A1 |
| 20090131353 | Insel et al. | May 2009 | A1 |
| 20090131543 | Weitz et al. | May 2009 | A1 |
| 20090191565 | Lapidus et al. | Jul 2009 | A1 |
| 20090197248 | Griffiths et al. | Aug 2009 | A1 |
| 20090197772 | Griffiths et al. | Aug 2009 | A1 |
| 20090246788 | Albert et al. | Oct 2009 | A1 |
| 20090325236 | Griffiths et al. | Dec 2009 | A1 |
| 20100003687 | Simen et al. | Jan 2010 | A1 |
| 20100009353 | Barnes et al. | Jan 2010 | A1 |
| 20100022414 | Link et al. | Jan 2010 | A1 |
| 20100035252 | Rothberg et al. | Feb 2010 | A1 |
| 20100075436 | Urdea et al. | Mar 2010 | A1 |
| 20100105112 | Holtze et al. | Apr 2010 | A1 |
| 20100113768 | Murthy et al. | May 2010 | A1 |
| 20100124759 | Wang et al. | May 2010 | A1 |
| 20100136544 | Agresti et al. | Jun 2010 | A1 |
| 20100137143 | Rothberg et al. | Jun 2010 | A1 |
| 20100137163 | Link et al. | Jun 2010 | A1 |
| 20100159592 | Holliger et al. | Jun 2010 | A1 |
| 20100172803 | Stone et al. | Jul 2010 | A1 |
| 20100188073 | Rothberg et al. | Jul 2010 | A1 |
| 20100197507 | Rothberg et al. | Aug 2010 | A1 |
| 20100210479 | Griffiths et al. | Aug 2010 | A1 |
| 20100213628 | Bausch et al. | Aug 2010 | A1 |
| 20100233026 | Ismagliov et al. | Sep 2010 | A1 |
| 20100282617 | Rothberg et al. | Nov 2010 | A1 |
| 20100300559 | Schultz et al. | Dec 2010 | A1 |
| 20100300895 | Nobile et al. | Dec 2010 | A1 |
| 20100301398 | Rothberg et al. | Dec 2010 | A1 |
| 20100304982 | Hinz et al. | Dec 2010 | A1 |
| 20110000560 | Miller et al. | Jan 2011 | A1 |
| 20110142734 | Ismagliov et al. | Jun 2011 | A1 |
| 20110174622 | Ismagilov et al. | Jul 2011 | A1 |
| 20110176966 | Ismagilov et al. | Jul 2011 | A1 |
| 20110177494 | Ismagilov et al. | Jul 2011 | A1 |
| 20110177586 | Ismagilov et al. | Jul 2011 | A1 |
| 20110177609 | Ismagilov et al. | Jul 2011 | A1 |
| 20110188717 | Baudry et al. | Aug 2011 | A1 |
| 20110190146 | Boehm et al. | Aug 2011 | A1 |
| 20110244455 | Larson et al. | Oct 2011 | A1 |
| 20110250597 | Larson et al. | Oct 2011 | A1 |
| 20110275063 | Weitz et al. | Nov 2011 | A1 |
| 20120010098 | Griffiths et al. | Jan 2012 | A1 |
| 20120015382 | Weitz et al. | Jan 2012 | A1 |
| 20120015822 | Weitz et al. | Jan 2012 | A1 |
| 20130157872 | Griffiths et al. | Jun 2013 | A1 |
| 20130178368 | Griffiths et al. | Jul 2013 | A1 |
| 20130217601 | Griffiths et al. | Aug 2013 | A1 |
| Number | Date | Country |
|---|---|---|
| 2177292 | Jan 1993 | AU |
| 677197 | Apr 1997 | AU |
| 680195 | Jul 1997 | AU |
| 747464 | May 2002 | AU |
| 768399 | Dec 2003 | AU |
| 2004225691 | Oct 2004 | AU |
| 2010224352 | Oct 2010 | AU |
| 8200642 | Dec 1982 | BR |
| 9710052 | Jan 2000 | BR |
| 1093344 | Jan 1981 | CA |
| 2520548 | Sep 2004 | CA |
| 563087 | Jun 1975 | CH |
| 563807 | Jul 1975 | CH |
| 2482070 | Mar 2002 | CN |
| 2100685 | Jul 1972 | DE |
| 3042915 | Sep 1981 | DE |
| 4308839 | Sep 1994 | DE |
| 4308839 | Apr 1997 | DE |
| 19536103 | Apr 1997 | DE |
| 19646372 | Jun 1997 | DE |
| 69126763 | Feb 1998 | DE |
| 0047130 | Feb 1985 | EP |
| 0402995 | Dec 1990 | EP |
| 0249007 | Mar 1991 | EP |
| 0418635 | Mar 1991 | EP |
| 0476178 | Mar 1992 | EP |
| 0486351 | May 1992 | EP |
| 0618001 | Oct 1994 | EP |
| 0718038 | Jun 1996 | EP |
| 0540281 | Jul 1996 | EP |
| 0528580 | Dec 1996 | EP |
| 0895120 | Feb 1999 | EP |
| 1741482 | Jan 2007 | EP |
| 2017910 | Jan 2009 | EP |
| 2127736 | Dec 2009 | EP |
| 2095413 | Feb 1997 | ES |
| 2404834 | Apr 1979 | FR |
| 2451579 | Oct 1980 | FR |
| 2469714 | May 1981 | FR |
| 2470385 | May 1981 | FR |
| 2650657 | Feb 1991 | FR |
| 2669028 | May 1992 | FR |
| 2703263 | Oct 1994 | FR |
| 0114854 | Apr 1969 | GB |
| 1446998 | Aug 1976 | GB |
| 1446998 | Aug 1976 | GB |
| 2005224 | Apr 1979 | GB |
| 2047880 | Dec 1980 | GB |
| 2062225 | May 1981 | GB |
| 2064114 | Jun 1981 | GB |
| 2097692 | Nov 1982 | GB |
| 0221053.2 | Jun 1989 | GB |
| 922432 | Feb 1993 | IE |
| S5372016 | Jun 1978 | JP |
| S5455495 | May 1979 | JP |
| S55125472 | Sep 1980 | JP |
| S5636053 | Apr 1981 | JP |
| S56124052 | Sep 1981 | JP |
| S5949832 | Mar 1984 | JP |
| S59102163 | Jun 1984 | JP |
| H03232525 | Oct 1991 | JP |
| H0665609 | Mar 1994 | JP |
| H06265447 | Sep 1994 | JP |
| H07489 | Jan 1995 | JP |
| H08153669 | Jun 1996 | JP |
| H10217477 | Aug 1998 | JP |
| 3-232525 | Oct 1998 | JP |
| 2000271475 | Oct 2000 | JP |
| 2000271475 | Oct 2000 | JP |
| 2001301154 | Oct 2001 | JP |
| 2005037346 | Feb 2005 | JP |
| 264353 | May 1996 | NZ |
| WO-8402000 | May 1984 | WO |
| WO-9105058 | Apr 1991 | WO |
| WO-9107772 | May 1991 | WO |
| 9116966 | Nov 1991 | WO |
| 9201812 | Feb 1992 | WO |
| WO-9203734 | Mar 1992 | WO |
| WO-9221746 | Dec 1992 | WO |
| WO-9303151 | Feb 1993 | WO |
| WO-9308278 | Apr 1993 | WO |
| 9322053 | Nov 1993 | WO |
| 9322055 | Nov 1993 | WO |
| 9322058 | Nov 1993 | WO |
| WO-9322053 | Nov 1993 | WO |
| WO-9322054 | Nov 1993 | WO |
| WO-9322055 | Nov 1993 | WO |
| WO-9322058 | Nov 1993 | WO |
| WO-9322421 | Nov 1993 | WO |
| WO-9416332 | Jul 1994 | WO |
| WO-9423738 | Oct 1994 | WO |
| WO-9424314 | Oct 1994 | WO |
| WO-9426766 | Nov 1994 | WO |
| WO-9800705 | Jan 1995 | WO |
| WO-9511922 | May 1995 | WO |
| WO-9519922 | Jul 1995 | WO |
| WO-9524929 | Sep 1995 | WO |
| WO-9533447 | Dec 1995 | WO |
| WO-9634112 | Oct 1996 | WO |
| WO-9638730 | Dec 1996 | WO |
| WO-9640062 | Dec 1996 | WO |
| WO-9640723 | Dec 1996 | WO |
| WO-9700125 | Jan 1997 | WO |
| WO-9700442 | Jan 1997 | WO |
| WO-9704297 | Feb 1997 | WO |
| WO-9704748 | Feb 1997 | WO |
| WO-9723140 | Jul 1997 | WO |
| WO-9728556 | Aug 1997 | WO |
| WO-9739814 | Oct 1997 | WO |
| WO-9740141 | Oct 1997 | WO |
| WO-9745644 | Dec 1997 | WO |
| WO-9747763 | Dec 1997 | WO |
| WO-9800231 | Jan 1998 | WO |
| WO-9802237 | Jan 1998 | WO |
| WO-9810267 | Mar 1998 | WO |
| WO-9813502 | Apr 1998 | WO |
| WO-9823733 | Jun 1998 | WO |
| WO-9831700 | Jul 1998 | WO |
| WO-9833001 | Jul 1998 | WO |
| WO-9834120 | Aug 1998 | WO |
| WO-9837186 | Aug 1998 | WO |
| WO-9841869 | Sep 1998 | WO |
| WO-9852691 | Nov 1998 | WO |
| WO-9858085 | Dec 1998 | WO |
| WO-9902671 | Jan 1999 | WO |
| WO-9922858 | May 1999 | WO |
| WO-9928020 | Jun 1999 | WO |
| WO-9931019 | Jun 1999 | WO |
| WO-0004139 | Jul 1999 | WO |
| 9942539 | Aug 1999 | WO |
| WO-9954730 | Oct 1999 | WO |
| WO-9961888 | Dec 1999 | WO |
| WO-0047322 | Feb 2000 | WO |
| WO-0052455 | Feb 2000 | WO |
| WO-0040712 | Jun 2000 | WO |
| 0054735 | Sep 2000 | WO |
| WO-0061275 | Oct 2000 | WO |
| WO-0070080 | Nov 2000 | WO |
| WO-0076673 | Dec 2000 | WO |
| WO-0112327 | Feb 2001 | WO |
| WO-0114589 | Mar 2001 | WO |
| WO-0118244 | Mar 2001 | WO |
| WO-0164332 | Sep 2001 | WO |
| WO-0168257 | Sep 2001 | WO |
| WO-0169289 | Sep 2001 | WO |
| 0180283 | Oct 2001 | WO |
| WO-0172431 | Oct 2001 | WO |
| WO-0180283 | Oct 2001 | WO |
| 0194635 | Dec 2001 | WO |
| 0216017 | Feb 2002 | WO |
| 0218949 | Mar 2002 | WO |
| WO-0218949 | Mar 2002 | WO |
| WO-0222869 | Mar 2002 | WO |
| WO-0223163 | Mar 2002 | WO |
| WO-0231203 | Apr 2002 | WO |
| WO-0247665 | Jun 2002 | WO |
| WO-02060275 | Aug 2002 | WO |
| 02068104 | Sep 2002 | WO |
| 02068104 | Sep 2002 | WO |
| WO-02078845 | Oct 2002 | WO |
| WO-02103011 | Dec 2002 | WO |
| WO-02103363 | Dec 2002 | WO |
| WO-03011443 | Feb 2003 | WO |
| WO-03037302 | May 2003 | WO |
| WO-03044187 | May 2003 | WO |
| WO-03078659 | Sep 2003 | WO |
| WO-03099843 | Dec 2003 | WO |
| WO-2004002627 | Jan 2004 | WO |
| WO-2004018497 | Mar 2004 | WO |
| WO-2004024917 | Mar 2004 | WO |
| WO-2004038363 | May 2004 | WO |
| WO-2004069849 | Aug 2004 | WO |
| WO-2004074504 | Sep 2004 | WO |
| WO-2004083443 | Sep 2004 | WO |
| WO-2004087308 | Oct 2004 | WO |
| WO-2004088314 | Oct 2004 | WO |
| WO-2004091763 | Oct 2004 | WO |
| WO-2004102204 | Nov 2004 | WO |
| WO-2004103565 | Dec 2004 | WO |
| WO-2005000970 | Jan 2005 | WO |
| WO-2005002730 | Jan 2005 | WO |
| WO-2005021151 | Mar 2005 | WO |
| WO-2005103106 | Nov 2005 | WO |
| WO-2005118138 | Dec 2005 | WO |
| WO-2006002641 | Jan 2006 | WO |
| WO-2006009657 | Jan 2006 | WO |
| WO-2006027757 | Mar 2006 | WO |
| WO-2006038035 | Apr 2006 | WO |
| WO-2006040551 | Apr 2006 | WO |
| WO-2006040554 | Apr 2006 | WO |
| WO-2006078841 | Jul 2006 | WO |
| WO-2006096571 | Sep 2006 | WO |
| WO-2006101851 | Sep 2006 | WO |
| WO-2007021343 | Feb 2007 | WO |
| WO-2007030501 | Mar 2007 | WO |
| WO-2007081385 | Jul 2007 | WO |
| WO-2007081387 | Jul 2007 | WO |
| WO-2007089541 | Aug 2007 | WO |
| WO-2007114794 | Oct 2007 | WO |
| WO-2007123744 | Nov 2007 | WO |
| WO-2007133710 | Nov 2007 | WO |
| WO-2007138178 | Dec 2007 | WO |
| WO-2008021123 | Feb 2008 | WO |
| WO-2008063227 | May 2008 | WO |
| WO-2008097559 | Aug 2008 | WO |
| WO-2008121342 | Oct 2008 | WO |
| WO-2008130623 | Oct 2008 | WO |
| 2009005680 | Jan 2009 | WO |
| WO-2009029229 | Mar 2009 | WO |
| WO-2010040006 | Apr 2010 | WO |
| WO-2010056728 | May 2010 | WO |
| WO-2010151776 | Dec 2010 | WO |
| WO-2011042564 | Apr 2011 | WO |
| 2011079176 | Jun 2011 | WO |
| Entry |
|---|
| Haynes Principles of Digital PCR and Measurement Issue Oct. 15, 2012. |
| Sakamoto, Rapid and simple quantification of bacterial cells by using a microfluidic device, Appl Env Microb. 71:2 (2005). |
| Heyries, Kevin A, et al., Megapixel digital PCR, Nat. Methods 8, 649-651 (2011). |
| Holtze, C., et al., Biocompatible surfactants for water-in-fluorocarbon emulsions, Lab Chip, 2008, 8, 1632-1639. |
| Du, Wenbin, et al., SlipChip, Lab Chip, 2009, 9, 2286-2292. |
| Shim, Jung-uk, et al., Using Microfluidics to Decoupled Nucleation and Growth of Protein Crystals, Cryst. Growth, Des. 2007; 7(11): 2192-2194. |
| Wang, Jun, et al., Quantifying EGFR Alterations in the Lung Cancer Genome with Nanofluidic Digital PCR Arrays, Clinical Chemistry 56:4 (2010). |
| Weaver, Suzanne, et al., Taking qPCR to a higher level: Analysis of CNV reveals the power of high throughput qPCR to enhance quantitative resolution, Methods 50, 271-276 (2010). |
| Wittwer, Carl T., et al., Minimizing the Time Required for DNA Amplification by Efficient Heat Transfer to Small Samples, Anal. Biochem., 186, 328-331 (1990). |
| Wittwer, C.T., et al., Automated polymerase chain reaction in capillary tubes with hot air, Nucleic Acids Res., 17(11) 4353-4357 (1989). |
| Woolley, Adam T., et al., Functional Integration of PCR Amplification and Capillary Electrophoresis in a Microfabricated DNA Analysis Device, Anal. Chem. 68, 4081-4086 (Dec. 1, 1996). |
| Woolley, Adam T. and Mathies, Richard A., Ultra-high-speed DNA fragment separations using microfabricated capillary array electrophoresis chips, Proc. Natl. Acad. Sci. USA, 91, 11348-11352 (Nov. 1994). |
| Zimmermann, Bernhard G., et al., Digital PCR: a powerful new tool for noninvasive prenatal diagnosis?, Prenat Diagn 28, 1087-1093 (2008). |
| Hindson, Benjamin J., et al., High-Throughput Droplet Digital PCR System for Absolute Quantitation of DNA Copy Number, Anal. Chem., 83, 8604-8610 (2011). |
| Krebber, C, et al., Selectivity-infective phage (SIP): a mechanistic dissection of a novel in vivo selection for protein-ligand interactions, Journal of Molecular Biology, 268, 607-618 (1997). |
| Malmborg, A, et al., Selective phage infection mediated by epitope expression on F pilus, Journal of Molecular Biology, 273, 544-551 (1997). |
| Benhar, I, et al., Highly efficient selection of phage antibodies mediated by display of antigen as Lpp-OmpA' fusions on live bacteria, Journal of Molecular Biology, 301 893-904 (2000). |
| De Wildt, Ruud, et al., Isolation of receptor-ligand pairs by capture of long-lived multivalent interaction complexes, Proceedings of the National Academy of Sciences of the United States, 99, 8530-8535 (2002). |
| Adang, A.E. et al., The contribution of combinatorial chemistry to lead generation: an interim analysis, Curr Med Chem 8: 985-998 (2001). |
| Affholter and F. Arnold, Engineering a Revolution, Chemistry in Britain, Apr. 1999, p. 48. |
| Agrawal and Tang, Site-specific functionalization of oligodeoxynucleotides for non-radioactive labelling, Tetrahedron Letters 31:1543-1546 (1990). |
| Aharoni et al., High-Throughput screens and selections of enzyme-encoding genes, Curr Opin Chem Biol, 9(2): 210-6 (2005). |
| Ahn et al., Dielectrophoretic manipulation of drops for high-speed microluidic sorting devices, Applied Phys Lett 88, 024104 (2006). |
| Allen et al., High throughput fluorescence polarization: a homogeneous alternative to radioligand binding for cell surface receptors J Biomol Screen. 5(2):63-9 (2000). |
| Altman et al., Solid-state laser using a rhodamine-doped silica gel compound, IEEE Photonics technology letters 3(3):189-190 (1991). |
| Amstutz, P. et al., In vitro display technologies: novel developments and applications. Curr Opin Biotechnol, 12, 400-405 (2001). |
| Anarbaev et al., Klenow fragment and DNA polymerase alpha-primase fromserva calf thymus in water-in-oil microemulsions, Biochim Biophy Acta 1384:315-324 (1998). |
| Anderson et al., Preparation of a cell-free protein-synthesizing system from wheat germ, Methods Enzymol 101:635-44 (1983). |
| Anderson, J.E., Restriction endonucleases and modification methylases, Curr. Op. Struct. Biol., 3:24-30 (1993). |
| Ando, S. et al., PLGA microspheres containing plasmid DNA: preservation of supercoiled DNA via cryopreparation and carbohydrate stabilization, J Pharm Sci, 88(1):126-130 (1999). |
| Angell et al., Silicon micromechanical devices, Scientific American 248:44-55 (1983). |
| Anhuf et al., Determination of SMN1 and SMN2 copy number using TaqMan technology, Hum Mutat 22(1):74-78 (2003). |
| Anna et al., Formation of dispersions using flow focusing in microchannels, Applied Physics Letters,82(3): 364-366 (2003). |
| Arkin, M.R. et al., Probing the importance of second sphere residues in an esterolytic antibody by phage display, J Mol Biol 284(4):1083-94 (1998). |
| Armstrong et al., Multiple-Component Condensation Strategies for Combinatorial Library Synthesis, Acc. Chem. Res. 29(3):123-131 (1996). |
| Ashkin et al., Optical trapping and manipulation of single cells using infrared laser beams, Nature 330:769-771 (1987). |
| Ashkin and Dziedzic, Optical trapping and manipulation of viruses and bacteria, Science 235(4795):1517-20 (1987). |
| Atwell, S. & Wells, J.A., Selection for Improved Subtiligases by Phage Display, PNAS 96: 9497-9502(1999). |
| Auroux, Pierre-Alain et al., Micro Total Analysis Systems. 2. Analytical Standard Operations and Applications, Analytical Chemistry, vol. 74, No. 12, 2002, pp. 2637-2652. |
| Baccarani et al., Escherichia coli dihydrofolate reductase: isolation and characterization of tWO isozymes, Biochemistry 16(16):3566-72 (1977). |
| Baez et al., Glutathione transferases catalyse the detoxication of oxidized metabolites (o-quinones) of catecholamines and may serve as an antioxidant system preventing degenerative cellular processes, Biochem. J 324:25-28 (1997). |
| Baker, M., Clever PCR: more genotyping, smaller volumes, Nature Methods 7:351-356 (2010). |
| Ball and Schwartz, CMATRIX: software for physiologically based pharmacokinetic modeling using a symbolic matrix representation system, Comput Biol Med 24(4):269-76 (1994). |
| Ballantyne and Nixon, Selective Area Metallization by Electron-Beam Controlled Direct Metallic Deposition, J. Vac. Sci. Technol. 10:1094 (1973). |
| Barany F., The ligase chain reaction in a PCR WO rld, PCR Methods and Applications 1(1):5-16 (1991). |
| Barany, F. Genetic disease detection and DNA amplification using cloned thermostable ligase, PNAS 88(1): 189-93 (1991). |
| Baret et al., Fluorescence-activated droplet sorting (FADS): efficient microfluidic cell sorting based on enzymatic activity, Lab on a Chip 9:1850-1858 (2009). |
| Baret et al., Kinetic aspects of emulsion stabilization by surfactants: a microfluidic analysis, Langmuir 25:6088-6093 (2009). |
| Bass et al., Hormone Phage: An Enrichment Method for Variant Proteins With Altered Binding Properties, Proteins 8:309-314(1990). |
| Bauer, J., Advances in cell separation: recent developments in counterflow centrifugal elutriation and continuous flow cell separation, J Chromotography, 722:55-69 (1999). |
| Beebe et al., Functional hydrogel structures for autonomous flow control inside microfluidic channels, Nature 404:588-590 (2000). |
| Beer et al., On-Chip, Real-Time, Single-Copy Polymerase Chain Reaction in Picoliter Droplets, Anal. Chem., 2007, v. 79, pp. 847-8475. |
| Bein, Thomas, Efficient Assays for Combinatorial methods for the Discovery of Catalysts, Agnew. Chem. Int. Ed. 38:3, 323-26 (1999). |
| Benichou et al., Double Emulsions Stabilized by New Molecular Recognition Hybrids of Natural Polymers, Polym. Adv. Tehcnol 13:1019-1031 (2002). |
| Benner, S.A., Expanding the genetic lexicon: incorporating non-standard amino acids into proteins by ribosome-based synthesis, Trends Biotechnol 12:158-63 (1994). |
| Benning, M.M. et al., The binding of substrate analogs to phosphotriesterase. J Biol Chem, 275, 30556-30560 (2000). |
| Berman et al., An agarose gel electrophoresis assay for the detection of DNA-binding activities in yeast cell extracts, Methods Enzymol 155:528-37 (1987). |
| Bernath et al, In Vitro Compartmentalization by Double Emulsions: Sorting and Gene Enrichment by Fluorescence Activated Cell Sorting, Anal. Biochem 325:151-157 (2004). |
| Bernath et al., Directed evolution of protein inhibitors of DNA-nucleases by in vitro compartmentalization (IVC) and nano-droplet delivery, J. Mol. Biol 345(5):1015-26 (2005). |
| Betlach, L. et al., A restriction endonuclease analysis of the bacterial plasmid controlling the EcoRl restriction and modification of DNA. Federation Proceedings, 35, 2037-2043 (1976). |
| Bibette et al., Emulsions: basic principles, Rep. Prog. Phys. 62: 969-1033 (1999). |
| Bico, Jose et al., Rise of Liquids and Bubbles in Angular Capillary Tubes, Journal of Colloid and Interface Science, vol. 247, 2002, pp. 162-166. |
| Bico, Jose et al., Self-Propelling Slugs, J. Fluid Mech., vol. 467, 2002, pp. 101-127. |
| Blattner and Dahlberg, RNA synthesis startpoints in bacteriophage lambda: are the promoter and operator transcribed?, Nature New Biol 237(77):227-32 (1972). |
| Boder et al., Yeast surface display for screening combinatorial polypeptide libraries, Nat Biotechnol 15(6):553-7 (1997). |
| Bougueleret, L. et al., Characterization of the gene coding for the EcoRV restriction and modification system of Escherichia coli, Nucleic Acids Res, 12(8):3659-76 (1984). |
| Boyum, A., Separation of leukocytes from blood and bone marrow. Introduction, Scand J Clin Lab Invest Suppl 97:7 (1968). |
| Branebjerg et al., Fast mixing by lamination, MEMS Proceedings 9th Ann WO rkshop, San Diego, Feb. 11-15, 1996, 9:441-446 (1996). |
| Braslaysky et al., Sequence information can be obtained from single DNA molecules, PNAS 100(7):3960-3964 (2003). |
| Bringer et al., Microfluidic Systems for Chemical Kinetics That Rely on Chaotic Mixing in Droplets, Philos Transact A Math Phys Eng Sci 362:1-18 (2004). |
| Brody et al., A self-assembled microlensing rotational probe, Applied Physics Letters, 74:144-46 (1999). |
| Brown et al., Chemical synthesis and cloning of a tyrosine tRNA gene, Methods Enzymol 68:109-151 (1979). |
| Bru, R. et al., Product inhibition of alpha-chymotrypsin in reverse micelles. Eur J Biochem 199(1): 95-103 (1991). |
| Bru, R. et al., Catalytic activity of elastase in reverse micelles, Biochem Mol Bio Int, 31(4):685-92 (1993). |
| Brummelkamp et al., A system for stable expression of short interfering RNAs in mammalian cells, Science 296(5567):550-3 (2002). |
| Buckpitt et al.,Hepatic and pulmonary microsomal metabolism of naphthalene to glutathione adducts: factors affecting the relative rates of conjugate formation, J. Pharmacol. Exp. Ther. 231:291-300 (1984). |
| Buican et al., Automated single-cell manipulation and sorting by light trapping, Applied Optics 26(24):5311-5316 (1987). |
| Burbaum, J., Miniaturization technologies in HTS: how fast, how small, how soon? Drug Discov Today 3:313-322 (1998). |
| Burns et al., Microfabricated structures for integrated DNA analysis, Proc. Natl. Acad. Sci. USA, May 1996, vol. 93, pp. 5556-5561. |
| Burns, Mark et al., An Integrated Nanoliter DNA Analysis Device, Science, vol. 282, 1998, pp. 484-487. |
| Burns, J.R. et al., The Intensification of Rapid Reactions in Multiphase Systems Using Slug Flow in Capillaries, Lab on a Chip, vol. 1, 2001 pp. 10-15. |
| Byrnes, P.J. et al., Sensitive fluorogenic substrates for the detection of trypsin-like proteases and pancreatic elastase, Anal Biochem, 126:447 (1982). |
| Cahill et al., Polymerase chain reaction and Q beta replicase amplification, Clin Chem 37(9):1482-5 (1991). |
| Caldwell, S.R. et al., Limits of diffusion in the hydrolysis of substrates by the phosphodiesterase from Pseudomonas diminuta, Biochemistry, 30: 7438-7444 (1991). |
| Calvert, P., Inkjet printing for materials and devices, Chem Mater 13: 3299-3305 (2001). |
| Caruthers, Gene synthesis machines: DNA chemistry and its uses, Science 230:281-285 (1985). |
| Chakrabarti, A.C. et al., Production of RNA by a polymerase protein encapsulated within phospholipid vesicles, J Mol Evol, 39(6):555-9 (1994). |
| Chamberlain and Ring, Characterization of T7-specific ribonucleic acid polymerase. 1. General properties of the enzymatic reaction and the template specificity of the enzyme, J Biol Chem 248:2235-44 (1973). |
| Chan, Emory M. et al., Size-Controlled Growth of CdSe Nanocrystals in Microfluidic Reactors, Nano Letters, vol. 3, No. 2, 2003, pp. 199-201. |
| Chang, T.M., Recycling of NAD(P) by multienzyme systems immobilized by microencapsulation in artifical cells, Methods Enzymol, 136(67):67-82 (1987). |
| Chang and Su, Controlled double emulsification utilizing 3D PDMS microchannels, Journal of Micromechanics and Microengineering 18:1-8 (2008). |
| Chao et al., Control of Concentration and Volume Gradients in Microfluidic Droplet Arrays for Protein Crystallization Screening, 26lh Annual International Conference of the IEEE Engineering in Medicine and Biology Society, San Francisco, California Sep. 1-5, (2004). |
| Chao et al., Droplet Arrays in Microfluidic Channels for Combinatorial Screening Assays, Hilton Head 2004: A Solid State Sensor, Actuator and Microsystems Wo rkshop, Hilton Head Island, South Carolina, Jun. 6-10, (2004). |
| Chapman et al., In vitro selection of catalytic RNAs, Curr. op. Struct. Biol., 4:618-22 (1994). |
| Chayen, Crystallization with oils: a new dimension in macromolecular crystal growth Journal of Crystal Growth 196 (1999), pgs. 434-441. |
| Chen et al., Capturing a Photoexcited Molecular Structure Through Time-Domain X-ray Absorption Fine Structure, Science 292(5515):262-264 (2001). |
| Chen et al., Microfluidic Switch for Embryo and Cell Sorting the 12th International Conference on Solid State Sensors, Actuators, and Microsystems, Boston, MA Jun. 8-12, 2003 Transducers, 1: 659-662 (2003). |
| Cheng, Z.,et al, Electro flow focusing inmicrofluidic devices, Microluidics Poster, presented at DBAS, Frontiers in Nanoscience, presented Apr. 10, 2003. |
| Chen-Goodspeed et al., Structural Determinants of the substrate and stereochemical specificity of phosphotriesterase, Biochemistry, 40(5):1325-31 (2001). |
| Chen-Goodspeed, M. et al., Enhancement, relaxation, and reversal of the stereoselectivity for phosphptriesterase by rational evolution of active site residues, Biochemistry, 40: 1332-1339 (2001 b). |
| Chetverin and Spirin, Replicable RNA vectors: prospects for cell-free gene amplification, expression, and cloning, Prog Nucleic Acid Res Mol Biol, 51:225-70 (1995). |
| Chiba et al., Controlled protein delivery from biodegradable tyrosino-containing poly(anhydride-co-imide) microspheres, Biomaterials, 18(13): 893-901 (1997). |
| Chiou et al., A closed-cylce capillary polymerase chain reaction machine, Analytical Chemistry, American Chemical Society, 73:2018-21 (2001). |
| Chiu et al., Chemical transformations in individual ultrasmall biomimetic containers, Science, 283: 1892-1895 (1999). |
| Chou et al., A mirofabricated device for sizing and sorting DNA molecules 96:11-13(1998). |
| Clackson, T. et al., In vitro selection from protein and peptide libraries, Trends Biotechnol, 12:173-84 (1994). |
| Clausell-Tormos et al., Droplet-based microfluidic platforms for the encapsulation and screening of Mammalian cells and multicellular organisms, Chem Biol 15(5):427-437 (2008). |
| Cohen, S. et al., Controlled delivery systems for proteins based on poly(lactic/glycolic acid) microspheres, Pharm Res, 8(6):713-720 (1991). |
| Collins et al., Optimization of Shear Driven Droplet Generation in a Microluidic Device, ASME International Mechanical Engineering Congress and R&D Expo, Washington (2003). |
| Collins, J. et al., Microfluidic flow transducer based on the measurements of electrical admittance, Lab on a Chip, 4:7-10 (2004). |
| Compton, J., Nucleic acid sequence-based amplification, Nature, 350(6313):91-2 (1991). |
| Cormack, B.P. et al., FACS-optimized mutants of the green fluorescent protein (GFP), Gene 173(1):33-38 (1996). |
| Cortesi et al., Production of lipospheres as carriers for bioactive compounds, Biomateials, 23(11): 2283-2294 (2002). |
| Craig, D. et al., Fluorescence-based enzymatic assay by capillary electrophoresis laser-induced fluoresence detection for the determinination of a few alpha-galactosidase molecules, Anal. Biochem. 226: 147 (1995). |
| Creagh, A.L. et al., Structural and catalytic properties of enzymes in reverse micelles, Enzyme Microb Technol 15(5): 383-92 (1993). |
| Crosland-Taylor, A Device for Counting Small Particles suspended in a Fluid through a Tube, Nature 171:37-38 (1953). |
| Crowley, J. M., Electrical breakdown of bimolecular lipid membranes as an electromechanical instability, Biophys J. 13(7):711-724 (1973). |
| Cull, M.G. et al., Screening for receptor ligands using large libraries of peptides linked to the C terminus of the lac repressor, PNAS 89:1865-9 (1992). |
| Curran, D.P., Strategy-level separations in organic synthesis: from planning to practice. Angew Chem Int Ed, 37: 1174-11-96 (1998). |
| Czarnik, A.W., Encoding methods for combinatorial chemistry, Curr Opin Chem Biol 1:60-66 (1997). |
| Dankwardt et al., Combinatorial synthesis of small-molecule libraries using 3-amino-5-hydroxybenzoic acid, 1:113-120 (1995). |
| Davis, S.S. et al., Multiple emulsions as targetable delivery systems, Methods in Enzymology, 149: 51-64 (1987). |
| Davis, J.A. et al., Deterministic hydrodynamics: Taking blood apart, PNAS 103:14779-14784 (2006). |
| De-Bashan, L. E. et al., Removal of ammonium and phosphorus ions from synthetic wastewater by the microalgae Chlorella vulgaris coimmobilized in alginate beads with the microalgae growth-promoting bacterium Azospirillum brasilense, Water Research 36 (2002),pp. 2941-2948. |
| de Gans, B.J. et al., Inkjet printing of polymers: state of the art and future developments, Advanced materials, 16: 203-213 (2004). |
| Delagrave, S. et al., Red-shifted excitation mutants of the green fluorescent protein, Biotechnology 13(2):151-4 (1995). |
| DelRaso, In vitro methodologies for enhanced toxicity testing, Toxicol. Lett. 68:91-99 (1993). |
| Demartis et al., A strategy for the isolation of catalytic activities from repertoires of enzymes displayed on phage, J. Mol. Biol 286:617-633 (1999). |
| Dickinson, E., Emulsions and droplet size control, Wedlock, D.J., Ed., in Controlled Particle Droplet and Bubble Formulation, ButterWO rth-Heine-mann, 191-257 (1994). |
| DiMatteo, et al., Genetic conversion of an SMN2 gene to SMN1: A novel approach to the treatment of spinal muscular atrophy, Exp Cell Res. 314(4):878-886 (2008). |
| Dinsmore et al., Colioidosomes: Selectively Permeable Capsules Composed of Colloidal Particles, Science 298(5595):1006-1009. (2002). |
| Dittrich et al., A new embedded process for compartmentalized cell-free protein expression and on-line detection in microfluidic devices, Chembiochem 6(5):811-814 (2005). |
| Doi, N. And Yanagawa, H. STABLE: protein-DNA fusion system for screening of combinatorial protein libraries in vitro, FEBS Lett., 457: 227-230 (1999). |
| Doi et al., In vitro selection of restriction endonucleases by in vitro compartmentilization, Nucleic Acids Res, 32(12): e95 (2004). |
| Doman, T.N. et al., Molecular docking and high-throughput screening for novel inhibitors of protein tyrosine phosphatase-1B, J Med Chem, 45: 2213-2221 (2002). |
| Domling and Ugi, Multicomponent Reactions with Isocyanides, Angew Chem Int Ed 39(18):3168-3210 (2000). |
| Domling A., Recent advances in isocyanide-based multicomponent chemistry, Curr Opin Chem Biol, 6(3):306-13 (2002). |
| Dove et al., In Brief, Nature Biotechnology 20:1213 (2002). |
| Dower et al., High efficiency transformation of E. coli by high voltage electroporation, Nucleic Acids Res 16:6127-6145 (1988). |
| Dressman et al., Transforming single DNA molecules into fluorescent magnetic particles for detection and enumeration of genetic variations, PNAS 100:8817-22 (2003). |
| Drmanac et al., Sequencing by hybridization: towards an automated sequencing of one million M13 clones arrayed on membranes, Elctrophoresis 13:566-573 (1992). |
| Dreyfus et al., Ordered and discordered patterns in tw-phase flows in microchannels, Phys Rev Lett 90(14):144505-1-144505-4 (2003). |
| Dubertret et al., In vivo imaging of quantum dots encapsulated in phospholipid micelles, Science, 298: 1759-1762 (2002). |
| Duffy et al., Rapid Protyping of Microfluidic Systems and Polydimethylsiloxane, Anal Chem 70:474-480 (1998). |
| Duggleby, R. G. Enzyme Kinetics and Mechanisms, Pt D. Academic Press 249:61-90 (1995). |
| Dumas, D.P., Purification and properties of the phosphotriesterase from Psuedomonas diminuta, J Biol Chem 264: 19659-19665 (1989). |
| Eckert and Kunkel, DNA polymerase fidelity and the polymerase chain reaction, Genome Res 1:17-24 (1991). |
| Edd et al., Controlled encapsulation of single-cells into monodisperse picolitre drops, Lab Chip 8(8):1262-1264 (2008). |
| Edel, Joshua B. et al., Microfluidic Routes to the Controlled Production of Nanopaticles, Chemical Communications, 2002 pp. 1136-1137. |
| Edris et al., Encapsulation of orange oil in a spray dried double emulsion, Nahrung/Food, 45(2):133-137 (2001). |
| Effenhauser et al., Glass chips for high-speed capillary electrophoresis separations with submicrometer plate heights, Anal Chem 65:2637-2642 (1993). |
| Eggers, Jens et al., Coalescence of Liquid Drops, J. Fluid Mech., vol. 401, 1999, pp. 293-310. |
| Ehrig, T. et al., Green-fluorescent protein mutants with altered fluorescence excitation spectra, Febs Lett, 367(2):163-66 (1995). |
| Eigen, Wie entsteht information? Prinzipien der selbstorganisatin in der biologie, Berichte der punsen-gesellschaft fur physikalische chemi, 80:1059-81 (1976). |
| Eigen et al., hypercycles and compartments: compartments assists—but does not replace—hypercyclic organization of early genetic information, J Theor Biol, 85:407-11 (1980). |
| Eigen et al., The hypercycle: coupling of RNA and protein biosynthesis in the infection cycle of an RNA bacteriophage, Biochemistry, 30:11005-18 (1991). |
| Ellington and Szostak, In vitro selection of RNA molecules that bind specific ligands, Nature, 346:818-822 (1990). |
| Ellman et al., Biosynthetic method for introducing unnatural amino acids site-specifically into proteins, Methods Enzymol, 202:301-36 (1991). |
| Endo et al., Autocatalytic decomposition of cobalt complexes as an indicator system for the determination of trace amounts of cobalt and effectors, Analyst 121:391-394 (1996). |
| Endo et al. Kinetic determination of trace cobalt by visual autocatalytic indication, Talanta 47:349-353 (1998). |
| Eow et al., Electrostatic enhancement of coalescence of water droplets in oil: a review of the technology, Chemical Engineeing Journal 85:357-368 (2002). |
| Eow, et al. Electrostatic and hydrodynamic separation of aqueous drops in a flowing viscous oil, Chemical Eng Proc 41:649-657 (2002). |
| Eow et al., Electrocoalesce-separators for the separation of aqueous drops from a flowing dielectric viscous liquid, Separation and Purification Tech 29:63-77 (2002). |
| Eow et al., Motion, deformation and break-up of aqueous drops in oils under high electric ?eld strengths, Chemical Eng Proc 42:259-272 (2003). |
| Eow et al., The behavior of a liquid-liquid interface and drop-interface coalescence under the in?uence of an electric field, Colloids and Surfaces A: Physiochern. Eng. Aspects 215:101-123 (2003). |
| Face et al., A mouse to human search for plasma proteome chagnes associated with pancreatic tumor development, PLoS Med 5(6):e123 (2008). |
| Fahy et al., Self-sustained sequence replication (3SR): an isothermal transcription-based amplification system alternative to PCR, PCR Methods Appl 1:25-33 (1991). |
| Fan and Harrison, Micromachining of capillary electrophoresis injectors and separators on glass chips and evaluation of flow at capillary intersections, Anal Chem 66:177-184. |
| Fastrez, J., In vivo versus in vitro screening or selection for catalytic activity in enzymes and abzymes, Mol Biotechnol 7(1):37-55 (1997). |
| Fettinger et al., Stacked modules for micro flow systems in chemical analysis: concept and studies using an enlarged model, Sens Actuat B. 17:19-25 (1993). |
| Fiedler et al., Dielectrophoretic sorting of particles and cells in a microsystem, Anal Chem 70(9):1909-1915 (1998). |
| Field, J. et al., Purification of a RAS-responsive adenylyl cyclase complex from Saccharomyces cervisiae by use of an epitope addition method. Mol Cell Biol, 8: 2159-2165 (1988). |
| Fields, S. And Song, O., A novel genetic system to detect protein-protein interactions, Nature 340(6230): 245-6 (1989). |
| Filella et al., TAG-72, CA 19.9 and CEA as tumor markers in gastric cancer, Acta Oncol. 33(7):747-751 (1994). |
| Finch, C.A., Industrial Microencapsulation: Polymers for Microcapsule Walls, pp. 1-12 in Encapsulation and Controlled Release, WO odhead Publishing (1993). |
| Finch, C.A., Encapsulation and controlled release, Spec Publ R Soc Chem, 138:35 (1993). |
| Fire & Xu, Rolling replication of short DNA circles, PNAS 92(10):4641-5 (1995). |
| Firestine, S.M. et al., Using an AraC-based three hybrid system to detect biocatalysts in vivo, Nat Biotechnol 18: 544-547 (2000). |
| Fisch et al., A strategy of exon shuffling for making large peptide repertoires displayed on filamentous bacteriophage, PNAS 93:7761-6 (1996). |
| Fisher et al., Cell Encapsulation on a Microfluidic Platform, The Eighth International Conference on Miniaturised Systems for Chemistry and Life Scieces, MicroTAS 2004, Sep. 26-30, Malmo, Sweden. |
| Fletcher et al., Micro reactors: principles and applications in organic synthesis, Tetrahedron 58:4735-4757 (2002). |
| Fluri et al., Integrated capillary electrophoresis devices with an efficient postcolumn reactor in planar quartz and glass chips, Anal Chem 68:4285-4290 (1996). |
| Fornusek, L. et al., Polymeric microspheres as diagnostic tools for cell surface marker tracing, Crit Rev Ther Drug Carrier Syst, 2:137-74 (1986). |
| Fowler, Enhancement of Mixing by Droplet-Based Microfluidics, Int Conf MEMS 97-100 (2002). |
| Freese, E., The specific mutagenic effect of base analogues on Phage T4, J Mol Biol, 1: 87 (1959). |
| Frenz et al., Reliable microfluidic on-chip incubation of droplets in delay-lines, Lab on a Chip 9:1344-1348 (2008). |
| Fu et al., A microfabricated fluorescence-activated cell sorter, Nature Biotechnology, 17(11):1109-1111 (1999). |
| Fu et al., An Integrated Microfabricated Cell Sorter, Anal. Chem., 74: 2451-2457 (2002). |
| Fulton et al., Advanced multiplexed analysis with the FlowMetrix system, Clin Chem 43:1749-1756 (1997). |
| Fulwyler, Electronic Separation of Biological Cells by Volume, Science 150(3698):910-911 (1965). |
| Gallarate et al., On the stability of ascorbic acid in emulsified systems for topical and cosmetic use, Int J Pharm 188(2):233-241 (1999). |
| Ganan-Calvo, Generation of Steady Liquid Microthreads and Micron-Sized Monodisperse Sprays and Gas Streams, Phys Rev Lett 80(2):285-288 (1998). |
| Ganan-Calvo, A.M., Perfectly Monodisperse Microbubbling by Capillary Flow Focusing, Phys Rev Lett 87(27): 274501-1-4 (2001). |
| Garcia-Ruiz et al., Investigation on protein crystal growth by the gel acupuncture method{, Acta, Cryst., 1994, D50, 99. pp. 484-490. |
| Garcia-Ruiz et al. A super-saturation wave of protein crystallization, J. Crystal Growth, 2001, v232, pp. 149-155. |
| Gasperlin et al., The structure elucidation of semisolid w/o emulsion systems containin silicone surfactant, Intl J Pharm, 107:51-6 (1994). |
| Gasperlin et al., Viscosity prediction of lipophillic semisolid emulsion systems by neural netWO rk modeling, Intl J Pharm, 196:37-50 (2000). |
| Georgiou et al., Display of heterologous proteins on the surface of microorganisms: from the screenign of combinatiorial libraires to live recombinant vaccines. Nat Biotechnol 15(1), 29-34 (1997). |
| Georgiou, G., Analysis of large libraries of protein mutants using flow cytometry, Adv Protein Chem, 55: 293-315 (2000). |
| Gerdts et al., A Synthetic Reaction NetWO rk: Chemical Amplification Using Nonequilibrium Autocatalytic Reactions Coupled in Time, J. Am. Chem. Soc 126:6327-6331 (2004). |
| Ghadessy et al., Directed Evolution of Polymerase Function by Compartmentalized Self-Replication, PNSAS 98(8): 4552-4557 (2001). |
| Gibbs et al., Detection of single DNA base differences by competitive oligonucleotide priming, Nucleic Acids Res. 17(7): 2437-48 (1989). |
| Gilliland, G., Analysis of cytokine mRNA and Dna: Detection and quantitation by competitive polymerase chain reaction, PNAS, 87(7):2725-9 (1990). |
| Giusti et al., Synthesis and characterization of 5{ fluorescent dye labeled oligonucleotides, Genome Res 2:223-227 (1993). |
| Gold et al., Diversity of Oligonucleotide Functions Annu Rev Biochem, 64: 763-97 (1995). |
| Goodall, J. L. et al., Operation of Mixed-Culture Immobilized Cell Reactors for the Metabolism of Meta- and Para-Nitrobenzoate by Comamonas Sp. JS46 and Comamonas Sp. JS47, Biotechnology and Bioengineering, vol. 59, No. 1, Jul. 5, 1998, pp. 21-27. |
| Gordon and Balasubramanian, Solid phase synthesis—designer linkers for combinatorial chemistry: a review, J. Chem. Technol. Biotechnol., 74(9):835-851 (1999). |
| Grasland-Mongrain et al., Droplet coalescence in microfluidic devices, 30 pages (Jul. 2003) From internet: http://www.eleves.ens.fr/home/grasland/rapports/stage4.pdf. |
| Green, R. And Szostak, J.W., Selection of a Ribozyme That Functions as a Superior Template in a Sel£ Copying Reaction, Science, 258: 1910-5 (1992). |
| Gregoriadis, G., Enzyme entrapment in liposomes, Methods Enzymol 44:218-227 (1976). |
| Griffiths et al., Isolation of high affinity human antibodies directly from large synthetic repertoires, Embo J 13(14):3245-60 (1994). |
| Griffiths, A.D. et al., Strategies for selection of antibodies by phage display, Curr Opin Biotechnol, 9:102-8 (1998). |
| Griffiths et al., Man-made enzymes-from design to in vitro compartmentalisation, Curr Opin Biotechnol 11:338-353 (2000). |
| Griffiths et al., Directed evolution of an extremely fast phosphotriesterase by in vitro compartmentalization, EMBO J, 22:24-35 (2003). |
| Griffiths, A., and Tawfik, D., Miniaturising the laboratory in emulsion droplets, Trend Biotech 24(9):395-402 (2006). |
| Guatelli, J.C. et al., Isothermal, in vitro amplification of nucleic acids by a multienzyme reaction modeled after retroviral replication, PNAS, 87(5):1874-8 (1990). |
| Guixe et al., Ligand-Induced Conformational Transitions in Escherichia Coli Phosphofructokinase 2: Evidence for an Allosteric Site for MgATP2n, Biochem., 37: 13269-12375 (1998). |
| Gupta, K.C., et al., A general method for the synthesis of 3′-sulfhydryl and phosphate group containing oligonucleotides, Nucl Acids Res 19 (11): 3019-3026 (1991). |
| Haber et al., Activity and spectroscopic properties of bovine liver catalase in sodium bis(2-ethylhexyl) sulfosuccinate/isooctane reverse micelles, Eur J Biochem 217(2): 567-73 (1993). |
| Habig and Jakoby, Assays for differentiation of glutathione S-transferases, Methods in Enzymology, 77: 398-405 (1981). |
| Hadd et al., Microchip Device for Performing Enzyme Assays, Anal. Chem 69(17): 3407-3412 (1997). |
| Haddad et al., A methodology for solving physiologically based pharmacokinetic models without the use of simulation software, Toxicol Lett. 85(2): 113-26 (1996). |
| Hagar and Spitzer, The effect of endotoxemia on concanavalin A induced alterations in cytoplasmic free calcium in rat spleen cells as determined with Fluo-3, Cell Calcium 13:123-130 (1992). |
| Hai et al., Investigation on the release of fluorescent markers from the w/o/w emulsions by fluorescenec-activated cell sorter, J Control Release, 96(3): 393-402 (2004). |
| Haies et al., Morphometric study of rat lung cells. I. Numerical and dimensional characteristics of parenchymal cell population, Am. Rev. Respir. Dis. 123:533-54 (1981). |
| Hall, Experimental evolution of Ebg enzyme provides clues about the evolution of catalysis and to evolutionary potential, FEMS Microbiol Lett, 174(1):1-8 (1999). |
| Hall, The EBG system of E. coli: origin and evolution of a novel beta-galactosidase for the metabolism of lactose, Genetica 118(2-3):143-56 (2003). |
| Han et al., Quantum-dot-tagged Microbeads for Multiplexed Optical Coding of Biomolecules, Nat Biotech 19(7): 631-635 (2001). |
| Handen, J.S., High-throughput screening- challenges for the future, Drug Discov WO rld, 47-50 (2002). |
| Handique, K. et al., On-Chip Thermopneumatic Pressure for Discrete Drop Pumping, Analytical Chemistry, vol. 73, 2001, pp. 1831-1838. |
| Hanes et al., In vitro selection and evolution of functional proteins by using ribosome display, PNAS 94:4937-42 (1997). |
| Hanes et al., Degradation of porous poly(anhydide-co-imide) microspheres and implication for controlled macromolecule deli very, Biomaterials, 19(1-3): 163-172(1998). |
| Hansen et al., A robust and scalable microfluidic metering method that allows protein crystal growth by free interface diffusion, PNAS 99(26):16531-16536 (2002). |
| Harada et al., Monoclonal antibody G6K12 specific for membrane-associated differentiation marker of human stratified squamous epithelia and squamous cell carcinoma, J. Oral Pathol. Med 22(4):145-152 (1993). |
| Harder, K.W. et al., Characterization and kinetic analysis of the intracellular domain of human protein tyrosine phosphatase beta (HPTP beta) using synthetic phosphopeptides, Biochem J 298 (Pt 2): 395-401 (1994). |
| Harries et al., A Numerical Model for Segmented Flow in a Microreactor, Int J of Heat and Mass Transfer, 46:3313-3322 (2006). |
| Harris et al., Single-molecule DNA sequencing of a viral genome, Science 320(5872):106-109 (2008). |
| Harrison et al., Micromachining a miniaturized capillary electrophoresis-based chemical analysis system on a chip, Science 261(5123):895-897 (1993). |
| Hasina et al., Plasminogen activator inhibitor-2: a molecular biomarker for head and neck cancer progression, Cancer Research 63:555-559 (2003). |
| Hayward et al., Dewetting Instability during the Formation of Polymersomes from BloceCopolymer-Stabilized Double Emulsions, Langmuir, 22(10): 4457-4461 (2006). |
| He et al., Selective encapsulation of single cells and subcellular organelles into picoliter- and femtoliter-vol. droplets, Anal Chem 77(6):1539-1544 (2005). |
| Heim et al., Engineering Green Fluorescent Protein for Improved Brightness, Longer Wavelengths and Fluorescence Response Energy Transfer, Carr. Biol, 6(2): 178-182 (1996). |
| Hellman et al., Differential tissue-specific protein markers of vaginal carcinoma, Br J Cancer, 100(8): 1303-131 (2009). |
| Hergenrother et al., Small-Molecule Microarrays: Covalent Attachment and Screening of Alcohol-Containing Small Molecules on Glass Slides, J. Am. Chem. Soc, 122: 7849-7850 (2000). |
| Hildebrand et al., Liquid-Liquid Solubility of Perfluoromethylcyclohexane with Benzene, Carbon Tetrachloride, Chlorobenzene, Chloroform and Toluene, J. Am. Chem. Soc, 71:22-25 (1949). |
| Hjelmfelt et al, Pattern-Recognition in Coupled Chemical Kinetic Systems, Science, 260(5106):335-337 (1993). |
| Ho, S.N. et al., Site-directed mutageneiss by overlap extension using the polymerase chain reaction, Gene, 77(1):51-9 (1989). |
| Hoang, Physiologically based pharmacokinetic models: mathematical fundamentals and simulation implementations, Toxicol Lett 79(1-3):99-106 (1995). |
| Hochuli et al., New metal chelate adsorbent selective for proteins and peptides containing neighbouring histidine residues, J Chromatogr 411: 177-84 (1987). |
| Holmes et al., Reagents for Combinatorial Organic Synthesis: Development of a New O-Nitrobenzyl Photolabile Linder for Solid Phase Synthesis, J. OrgChem., 60: 2318-2319(1995). |
| Hong, S.B. et al., Stereochemical constraints on the substrate specificity of phosphodiesterase, Biochemistry, 38: 1159-1165 (1999). |
| Hoogenboom et al., Multi-subunit proteins on the surface of filamentous phage: methodologies for displaying antibody (Fab) heavy and light chains, Nucl Acids Res., 91: 4133-4137 (1991). |
| Hoogenboom, H.R., Designing and optimizing library selection strategies for generating high-affinity antibodies, Trends Biotechnol, 15:62-70 (1997). |
| Hopfinger & Lasheras, Explosive Breakup of a Liquid Jet by a Swirling Coaxial Jet, Physics of Fluids 8(7):1696-1700 (1996). |
| Hopman et al., Rapid synthesis of biotin-, digoxigenin-, trinitrophenyl-, and fluorochrome-labeled tyramides and their application for in situ hybridization using Card amplification, J of Histochem and Cytochem, 46(6):771-77 (1998). |
| Horton et al., Engineering hybrid genes without the use of restriction enzymes: gene splicing by overlap extension, Gene 77(1), 61-8 (1989). |
| Hosokawa, Kazuo et al., Handling of Picoliter Liquid Samples in a Poly(dimethylsiloxane)-Based Microfluidic Device, Analytical Chemistry, vol. 71, No. 20, 1999 pp. 4781-4785. |
| Hsu et al., Comparison of process parameters for microencapsulation of plasmid DNA in poly(D, L-lactic-co-glycolic acid microspheres, J Drug Target, 7:313-23 (1999). |
| Huang, Z.J., Kinetic assay of fluorescein mono-beta-D-galactosidase hydrolysis by beta-galactosidase: a front-face measurement for strongly absorbing fluorogenic substrates, Biochemistry, 30:8530-4 (1991). |
| Huang, Z. et al., A sensitive competitive ELISA for 2,4-dinitrophenol using 3,6-fluorescein diphosphate as a fluorogenic substrate, J Immunol Meth, 149:261 (1992). |
| Huang L. R. et al., Continuous particle separation through deterministic lateral displacement, Science 304(5673):987-990 (2004). |
| Hubert et al. Data Concordance from a Comparison between Filter Binding and Fluorescence Polarization Assay Formats for Identification of RUOCK-II Inhibitors, J biomol Screen 8(4):399-409 (2003). |
| Huebner, A. et al., Quantitative detection of protein expression in single cells using droplet microfluidics, Chem Com 12:1218-1220 (2007). |
| Hung et al., Optimization of Droplet Generation by controlling PDMS Surface Hydrophobicity, 2004 ASME International Mechanical Engineering Congrees and RD&D Expo, Nov. 13-19, 2004, Anaheim, CA. |
| Hung, et al, Controlled Droplet Fusion in Microfluidic Devices, MicroTAS 2004, Sep. 26-30, Malmo, Sweden (2004). |
| Hutchison et al., Cell-free cloning using Phi29 polymerase, PNAS 102(48):17332-17336 (2005). |
| Ibrahim, S.F. et al., High-speed cell sorting: fundamentals and recent advances, Curr Opin Biotchnol, 14(1):5-12 (2003). |
| Ikeda et al., Bioactivation of tegafur to 5-fluorouracil is catalyzed by cytochrome P-450 2A6 in human liver microsomes in vitro, Clin Cancer Res 6(11):4409-4415 (2000). |
| Inai et al., Immunohistochemical detection of an enamel protein-related epitope in rat bone at an early stage of osteogenesis, Histochemistry 99(5):335-362 (1993). |
| Ismagilov, Integrated Microfluidic Systems, Angew. Chem. Int. Ed 42:4130-4132 (2003). |
| Janda, et al, Chemical selection for catalysis in combinatorial antibody libraries, Science, 275:945-948 (1997). |
| Jang et al., Controllable delivery of non-viral DNA from porous scaffold, J Controlled Release 86(1):157-168 (2003). |
| Jermutus et al., Recent advances in producing and selecting functional proteins by using cell-free translation, Curr Opin Biotechnol 9(5): 534-48 (1998). |
| Jestin et al., A Method for the Selection of Catalytic Activity Using Phage Display and Proximity Coupling, Agnew. Chem. Int. Ed. Engi. 38(8):1124-1127 (1999). |
| Jo, et al, Encapsulation of Bovine Serum Albumin in Temperature-Programmed Shell-in-Shell Structures, Macromol. Rapid Comm 24:957-962 (2003). |
| Joerger et al., Analyte detection with DNA-labeled antibodies and polymerase chain reaction, Clin. Chem. 41(9):1371-7 (1995). |
| Johannsson et al., Amplification by Second Enzymes, in ELISA and Other Solid Phase Immunoassays, Kemeny et al (ed.), Chapter 4, pp. 85-106 John Wiley (1988). |
| Johannsson, A., Heterogeneous Enzyme Immunoassays, in Principles and Practice of Immunoassay, pp. 295-325 Stockton Press (1991). |
| Johnson, T.O. et al., Protein tyrosine phosphatase 1B inhibitors for diabetes, Nature Review Drug Discovery 1, 696-709 (2002). |
| Jones, L.J. et al., Quenched BODIPY dye-labeled casein substrates for the assay of protease activity by direct fluorescence measurement, Anal Biochem, 251:144 (1997). |
| Jones et al. Glowing jellyfish, luminescence and a molecule called coelenterazine, Trends Biotechnol. 17(12):477-81 (1999). |
| Joo et al., Laboratory evolution of peroxide-mediated cytochrome P450 hydroxylaion, Nature 399:670 (1999). |
| Joos et al., Covalent attachment of hybridizable oligonucleotides to glass supports, Analytical Biochemistry 247:96-101 (1997). |
| Joyce, G.F., In vitro Evolution of Nucleic Acids, Curr. Opp. Structural Biol, 4: 331-336 (1994). |
| Kadir and Moore, Haem binding to horse spleen ferritin, Febs Lett, 276: 81-4 (1990). |
| Kallen, R.G. et al., The mechanism of the condensation of formaldehyde with tetrahydrofolic acid, J. Biol. Chem., 241:5851-63 (1966). |
| Kambara et al., Optimization of Parameters in a DNA Sequenator Using Fluorescence Detection, Nature Biotechnology 6:816-821 (1988). |
| Kamensky et al., Spectrophotometer: new instrument for ultrarapid cell analysis, Science 150(3696):630-631 (1965). |
| Kanouni et al., Preparation of a stable double emulsion (W1/0/W2): role of the interfacial ilrns on the stability of the system, Adv. Collid. lnterf. Sci., 99(3): 229-254 (2002). |
| Katanaev et al., Viral Q beta Rna as a high expression vector for mRNA translation in a cell-free system, Febs Lett, 359:89-92 (1995). |
| Katsura et al., Indirect micromanipulation of single molecules in water-in-oil emulsion, Electrophoresis, 22:289-93 (2001). |
| Kawakatsu et al., Regular-sized cell creation in microchannel emulsification by visual microprocessing method, Journal of the American Oil ChemistS Society, 74:317-21 (1997). |
| Keana J. & Cai, S. X., New reagents for photoaffinity labeling: synthesis and photolysis of functionalized perfluorophenyl azides, J. Org. Chem.55(11):3640-3647 (1990). |
| Keefe, A.D. et al., Functional proteins from a random-sequence library, Nature, 410: 715-718 (2001). |
| Keij, J.F., et al., High-speed photodamage cell sorting: an evaluation of the ZAPPER prototype, Methods in cell biology, 42: 371-358 (1994). |
| Keij et al., High-Speed Photodamage Cell Selection Using a Frequency-Doubled Argon Ion Laser, Cytometry, 19(3): 209-216 (1995). |
| Kelly et al., Miniaturizing chemistry and biology in microdroplets, Chem Commun 18:1773-1788 (2007). |
| Kerker, M., Elastic and inelastic light scattering in flow cytometry, Cytometry, 4:1-10 (1983). |
| Khandjian, UV crosslinking of RNA to nylon membrane enhances hybridization signals, Mol. Bio. Rep. 11: 107-115 (1986). |
| Kim S. et al, Type II quantum dots: CdTe/CdSe (core/shell) and CdSe/ZnTe (core/shell) heterostructures, J. Am Chem Soc. 125:11466-11467 (2003). |
| Kim et al., Comparative study on sustained release of human growth hormone from semi-crystalline poly(L-lactic acid) and amorphous poly(D,L-lactic-co-glycolic acid) microspheres: morphological effect on protein release, Journal of Controlled Release, 98(1):115-125 (2004). |
| Kircher et al., High-throughput DNA sequencing-concepts and limitations, Bioessays 32(6):524-536 (2010). |
| Kiss et al., High-throughput quantitative polymerase chain reaction in picoliter droplets, Anal. Chem 80:8975-8981 (2008). |
| Kitagawa et al., Manipulation of a single cell with microcapillary tubing based on its electrophoretic mobility, Electrophoresis 16:1364-1368 (1995). |
| Klug and Famulok, All you wanted to know about selex, Molecular Biology Reports, 20:97-107 (1994). |
| Klug, A., Gene Regulatory Proteins and Their Interaction with DNA, Ann NY Acad Sci, 758: 143-60 (1995). |
| Klug and Schwabe, Protein motifs 5. Zinc fingers, FASEB J 9(8):597-604 (1995). |
| Knaak et al., Development of partition coefficients, Vmax and Km values, and allometric relationships, Toxicol Lett. 79(I-3):87-98 (1995). |
| Knight, James B., Hydrodynamic Focusing on a Silicon Chip: Mixing Nanoliters in Microseconds, Physical Review Lett 80(17):3863-3866 (1998). |
| Kojima et al. PCR amplification from single DNA molecules on magnetic beads in emulsion: application for high-throughput screening of transcription factor targets. Nucleic Acids Res. 33:e150 (2005). |
| Kolb et al., Cotranslational folding of proteins, Biochem Cell Biol, 73:1217-20 (1995). |
| Kopp et al., Chemical amplification: continuous flow PCR on a chip, Science, 280:1046-48 (1998). |
| Koster et al., Drop-based micro?uidic devices for encapsulation of single cells, Lab on a Chip 8:1110-1115 (2008). |
| Kowalczykowski et al., Biochemistry of homologous recombination in Escherichia coli, Microbiol Rev 58(3):401-65 (1994). |
| Krafft et al., Emulsions and microemulsions with a ?uorocarbon phase, Colloid and Interface Science 8(3):251-258 (2003). |
| Krafft et al., Synthesis and preliminary data on the biocompatibility and emulsifying properties of perfluoroalkylated phosphoramidates as injectable surfactants, Eur. J. Med. Chem., 26:545-550 (1991). |
| Kralj et al., Surfactant-enhanced liquid-liquid extraction in microfluidic channels with inline electric-field enhanced coalescence, Lab Chip 5:531-535 (2005). |
| Kricka and Wilding, Micromachining: a new direction for clinical analyzers, Pure and Applied Chemistry 68(10):1831-1836 (1996). |
| Kricka and Wilding, Microchip PCR, Anal Bioanal Chem 377(5):820-825 (2003). |
| Krumdiek, C.L. et al., Solid-phase synthesis of pteroylpolyglutamates, Methods Enzymol, 52429 (1980). |
| Kumar, A. et al., Activity and kinetic characteristics of gltathione reductase in vitro in reverse micellar waterpool, Biochem Biophys Acta, 996(1-2):1-6 (1989). |
| Lage et al., Whole genome analysis of genetic alterations in small DNA samples using hyperbranched strand displacement amplification and array-CGH. Genome Res. 13: 294-307 (2003). |
| Lamprecht et al., pH-sensitive microsphere delivery increases oral bioavailability of calcitonin, Journal of Controlled Release, 98(1): 1-9(2004). |
| Lancet, D. et al., Probability model for molecular recognition in biuological receptor repertoirs: significance to the olfactory system, PNAS, 90(8):3715-9 (1993). |
| Landergren et al., A ligase mediated gene detection technique. Science 241(4869):1077-80 (1988). |
| Lasheras, et al., Breakup and Atomization of a Round Water Jet by a High Speed Annular Air Jet, J Fluid Mechanics 357:351-379 (1998). |
| Leary et al., Application of Advanced Cytometric and Molecular Technologies to Minimal Residual Disease Monitoring, Proceedings of SPIE 3913:36-44 (2000). |
| Lee, et al, Preparation of Silica Paticles Encapsulating Retinol Using O/W/O Multiple Emulsions, Journal of Colloid and Interface Science, 240(1): 83-89 (2001). |
| Lee, et al, Effective Formation of Silicone-in-Fluorocarbon-in-Water Double Emulsions: Studies on Droplet Morphology and Stability, Journal of Dispersion Sci Tech 23(4):491-497(2002). |
| Lee et al, Investigating the target recognition of DNA cytosine-5 methyltransferase Hhal by library selection using in vitro compartmentalisation (IVC), Nucleic Acids Res 30:4937-4944 (2002). |
| Lemof, et al, An AC Magnetohydrodynamic Microfluidic Switch for Micro Total Analysis Systems, Biomedical Microdevices, 5(I):55-60 (2003). |
| Lesley et al., Use of in vitro protein synthesis from PCR-generated templates to study interaction of E coli transcription factors with core RNA polymerase, J Biol Chem 266(4):2632-8 (1991). |
| Lesley, S.A., Preparation and use of E. coli S-30 extracts, Methods Mol Biol, 37:265-78 (1995). |
| Leung et al., A method for random mutagenesis of a defined DNA segment using a modified polymerase chain reaction. Technique 1:11-15 (1989). |
| Li et al., Single-step procedure for labeling DNA strand breaks with lourescein-or BODIPY-conjugated deoxynucleotides: detection of apoptosis and bromodeoxyuridine incorporation. Cytometry 20:172-180 (1995). |
| Li and Harrison, Transport, Manipulation, and Reaction of Biological Cells On-Chip Using Electrokinetic Effects, Analytical Chemistry 69(8):1564-1568 (1997). |
| Li et al., Nanoliter microfluidic hybrid method for simultaneous screening and optimization validated with crystallization of membrane proteins, PNAS 103: 19243-19248 (2006). |
| Liao et al., Isolation of a thermostable enzyme variant by cloning and selection in a thermophile, PNAS 83:576-80 (1986). |
| Lim et al., Microencapsulated islets as bioartificial endocrine pancreas, Science 210(4472):908-10 (1980). |
| Link et al, Geometrically Mediated Breakup of Drops in Microfluidic Devices, Phys. Rev. Lett., 92(5): 054503-1 thru 054503-4 (2004). |
| Link et al., Electric control droplets in microfluidic devices, Angew Chem Int Ed 45:2556-2560 (2006). |
| Lipinski et al., Experimental and Computational Approaches to Estimate Solubility and Permeability in Drug Discovery and Development Settings,A.:iv. Drug Deliv. Rev., 46:3-26 (2001). |
| Lipkin et al., Biomarkers of increased susceptibility to gastreointestinal cancer: new application to studies of cancer prevention in human subjects, Cancer Research 48:235-245 (1988). |
| Liu et al., Passive Mixing in a Three-Dimensional Serpentine MicroChannel, J MEMS 9(2):190-197 (2000). |
| Liu et al., Fabrication and characterization of hydrogel-based microvalves, Mecoelectromech. Syst.11:45-53 (2002). |
| Lizardi et al., Mutation detection and single-molecule counting using isothermal rolling-circle amplification. Nat Genet 19(3):225-32 (1998). |
| Loakes and Brown, 5-Nitroindole as a universal base analogue. Nucleic Acids Res 22: 4039-4043 (1994). |
| Loakes et al., Stability and structure of DNA oligonucleotides containing non-specific base analogues. J. Mol. Biol 270:426-435 (1997). |
| Loeker et al., Colloids and Surfaces A: Physicochem. Eng. Aspects 214: 143-150, 2003). |
| Lopez-Herrera, et al, {the electrospraying of viscous and non-viscous semi-insulating liquids. Scoffing laws,{ Bulletin of the American Physical Society, vol. 40, No. 12, pp. 2041 (1995). |
| Lopez-Herrera, et al, {One-Dimensional Simulation of the Breakup of Capillary Jets of Conducting Liquids Application to E.H.D. Spraying,{./. Aerosol. Set, vol. 30, No. 7, pp. 895-912 (1999). |
| Lopez-Herrera, et al, {Coaxial jets generated from electrified Taylor cones. Scaling laws.,{ Aerosol Science, vol. 34, pp. 535-552 (2003). |
| Lorenceau et al, Generation of Polymerosomes from Double-Emulsions, Langmuir, 21(20): 9183-9186 (2005). |
| Lorenz et al, Isolation and expression of a cDNA encoding Renilla reniformis luciferase, PNAS 88(10):4438-42 (1991). |
| Loscertales, et al, Micro/Nano Encapsulation via Electrified Coaxial Liquid Jets, Science, 295(5560): 1695-1698 (2002). |
| Low N.M. et al., Mimicking somatic hypermutaion: affinity maturation of antibodies displayed on bacteriophage using a bacterila mutator strain. J Mol Biol 260(3), 359-68 (1996). |
| Lowe, K.C., Perfluorochemical respiratory gas carriers: benefits to cell culture systems, J Fluorine Chem 118:19-26 (2002). |
| Lowman et al., Selecting high affinity binding proteins by monovalent phage display, Biochemistry 30(45):10832-8 (1991). |
| Lu et al., Robust fluorescein-doped silica nanoparticles via dense-liquid treatment, Colloids and Surfaces A Physicochemical and Engineering Aspects, 303(3):207-210 (2007). |
| Luisi et al, Activity and Conformation of Enzymes in Reverse Micellar Solutions, Meth. Enzymol 136:188-216 (1987). |
| Lund et al., Assesment of methods for covalent binding of nucleic acids to magnetic beads, Dynabeads, and the characteristics of the bound nucleic acids in hybridization reactions, Nucleic Acids Research, Oxford University Press, 16(22) (1998). |
| Lunderberg et al., Solid-phase technology: magnetic beads to improve nucleic acid detection and analysis, Biotechnology Annual Review, 1:373-401 (1995). |
| Lundstrom, et al, Breakthrough in cancer therapy: Encapsulation of drugs and viruses, www.currentdrugdiscovery.com, Nov. 19-23, (2002). |
| Lyne, P.D., Structure-Based Virtual Screening: An Overview, Drug Discov. Today, 7(20):1047-1055 (2002). |
| Ma, C. et al., In vitro protein engineering using synthetic tRNA(Ala) with different anticodons, Biochemistry 32(31):7939-45 (1993). |
| Mackenzie et al., The application of flow microfluorimetry to biomedical research and diagnosis: a review, Dev Biol Stand 64:181-193 (1986). |
| Maclean, D. et al., Glossary of terms used in combinatorial chemistry, Pure Appl. Chem. 71(12):2349-2365 (1999). |
| Magdassi et al., Multiple Emulsions: HLB Shift Caused by Emulsifier Migration to External Interface, J. Colloid Interface Sci 97:374-379 (1984). |
| Mahajan et al., Bcl-2 and Bax Interactions in Mitochondria Probed with Green Florescent Protein and Fluorescence Resonance Energy Transfer, Nat. Biotechnol. 16(6): 547-552 (1998). |
| Manley et al., In vitro transcription: whole cell extract, Methods Enzymol, 101:568-82 (1983). |
| Manz et al., Micromachining of monocrystalline silicon and glass for chemical analysis systems a look into next century{s technology or just a fashionable craze?, Trends in Analytical Chemistry 10(5):144-149 (1991). |
| Mao, Q. et al., Substrate effects on the enzymatic activity of alphachymotrypsin in reverse micelles, Biochem Biophys Res Commun, 178(3):1105-12 (1991). |
| Mao et al., Kinetic behaviour of alpha-chymotrypsin in reverse micelles: a stopped-flow study, Eur J Biochem 208(1):165-70 (1992). |
| Mardis, E.R., The impact of next-generation sequencing technology on genetics, Trends Genet 24:133-141 (2008). |
| Margulies, M et al., Genome sequencing in microfabricated high-density picolitre reactors, Nature 437(7057):376-380 (2005). |
| Marques et al., Porous Flow within Concentric Cylinders, Bull Am Phys Soc Div Fluid Dyn 41:1768 (1996). |
| Mason, T.J. And Bibette, J. Shear Rupturing of Droplets in Complex Fluids, Langmuir, 13(17):4600-4613 (1997). |
| Mastrobattista et al., High-throughput screening of enzyme libraries: in vitro evolution of a beta-galactosidase by fluorescence-activated sorting of double emulsions, Chem. Biol. 12(12): 1291-1300 (2005). |
| Masui et ai., Probing of DNA-Binding Sites of Escherichia Coli RecA Protein Utilizing 1-anilinonaphthalene-8-Sulfonic Acid, Biochem 37(35):12133-12143 (1998). |
| Matayoshi, E.D. et al., Novel fluorogenic substrates for assaying retroviral proteases by resonance energy transfer, Science 247:954 (1990). |
| Mattheakis et al., An in vitro polysome display system for identifying ligands from very large peptide libraries, PNAS 91:9022-6 (1994). |
| Mayr, L.M., and Fuerst, P., The Future of High-Throughput Screening, JBiomol Screen 13:443-448 (2008). |
| Mazutis et al., Droplet-Based Microfluidic Systems for High-Throughput Single DNA Molecule Isothermal Amplification and Analysis, Anal Chem 81(12):4813-4821 (2009). |
| Mazutis et al., Multi-step microfluidic droplet processing: kinetic analysis of an in vitro translated enzyme, Lab Chip 9:2902-2908 (2009). |
| McCafferty et al., Phage antibodies: filamentous phage displaying antibody variable domains,Nature, 348: 552-4 (1990). |
| McDonald et al. Fabrication of microfluidic systems in poly(dimethylsiloxane), Electrophoresis 21(1):27-40 (2000). |
| McDonald and Whitesides, Poly(dimethylsiloxane) as a material for fabricating microfluidic devices, Account Chem. Res. 35:491-499 (2002). |
| Melton et al., Efficient in vitro synthesis of biologically active RNA and RNA hybridization probes from plasmids containing a bacteriophage SP6 promoter, Nucl. Acids Res. 12(18):7035-7056 (1984). |
| Mendel, D. et al., Site-Directed Mutagenesis with an Expanded Genetic Code, Annu Rev Biophys Biomol Struct, 24:435-62 (1995). |
| Menger and Yamada, Enzyme catalysis in water pools, J. Am. Chem. Soc., 101:6731-4 (1979). |
| Meylan and Howard, Atom/fragment contribution method for estimating octanol-water partition coefficients, J Pharm Sci. 84(1):83-92 (1995). |
| Miele et al., Autocatalytic replication of a recombinant RNA, J Mol Biol, 171:281-95 (1983). |
| Minshuil, J. And Stemmer, W.P., Protein evolution by molecular breeding, Curr Opin Chem Biol 3(3): 284-90 (1999). |
| Miroux and Walker, Over-production of proteins in Escherichia coli: mutant hosts that allow synthesis of some membrane proteins and globular proteins at high levels, J of Mol Biol 260(3):289-98 (1996). |
| Miyawaki et at., Fluorescent Indicators for Ca2+ Based on Green Fluorescent Proteins and Calmodulin, Nature, 388: 882-887 (1997). |
| Mize et al., Dual-enzyme cascade--an amplified method for the detection of alkaline phosphatase, Anal Biochem 179(2): 229-35 (1989). |
| Mock et al., A fluorometric assay for the biotin-avidin interaction based on displacement of the fluorescent probe 2-anilinonaphthalene-6-sulfonic acid, Anal Biochem, 151:178-81 (1985). |
| Moldavan, A., Photo-electric technique for the counting of microscopical cells, Science 80:188-189 (1934). |
| Montigiani, S. et al., Alanine substitutions in calmodulin-binding peptides result in unexpected affinity enhancement, J Mol Biol, 258:6-13 (1996). |
| Moore, M.J., Exploration by lamp light, Nature, 374:766-7 (1995). |
| Moudrianakis and Beer, Base sequence determination in nucelic acids with the electron microscope 3. Chemistry and microscopy of guanine-labeled DNA, PNAS 53:564-71 (1965). |
| Mudler et al., Characterization of tWO human monoclonal antibodies reactive with HLA-B12 and HLA-B60, respectively, raised by in vitro secondary immunization of peripheral blood lymphocytes, Hum. Immunol., 36(3):186 192, 1993. |
| Mulbry, W.W. et al., Parathion hydrolase specified by the Flavobacterium opd gene: relationshio between the gene and protein. J Bacteriol, 171: 6740-6746 (1989). |
| Nakano et al., Single-molecule reverse transcription polymerase chain reaction using water-in-oil emulsion, J Biosci Bioeng 99:293-295 (2005). |
| Nakano et al., Single-molecule PCR using water-in-oil emulsion, J Biotech, 102:117-24 (2003). |
| Nametkin, S.N. et al., Cell-free translation in reversed micelles, FEB Letters, 309(3):330-32. |
| Narang et al, Improved phosphotriester method for the synthesis of gene fragments, Methods Enzymol, 68:90-98 (1979). |
| Nelson, P. S., et al., Bifunctional oligonucleotide probes synthesized using a novel CPG support are able to detect single base pair mutations, Nucl Acids Res 17(18): 7187-7194 (1989). |
| Nemoto et al., In vitro virus: bonding of mRNA bearing puromycin at the 3{-terminal end to the C-terminal end of its encoded protein on the ribosome in vitro, Federation of European Biochemical Societies, 414:405-8 (1997). |
| Ness, J.E. et al., Molecular Breeding: the natural approach to protein design. Adv Protein Chem, 55: 261-292 (2000). |
| Ng et al., Protein crystallization by capillary counter-diffusion for applied crystallographic structure determination, J. Struct. Biol. 2003, v142, pp. 218-231. |
| Ng, B.L. et al., Factors affecting flow karyotype resolution, Cytometry, Part A 69A: 1028-1036 (2006). |
| Nguyen et al., Optical detection for droplet size control in microfluidic droplet-based analysis systems, Sensors and Actuators B 117(2):431-436 (2006). |
| Nihant et al., Polylactide Microparticles Prepared by Double Emulsion/Evaporation Technique. I. Effect of Primary Emulsion Stability, Pharmaceutical Research, 11(10):1479-1484 (1994). |
| Nisisako, Takasi et al., Droplet Formation in a MicroChannel NetWO rk, Lab on a Chip, vol. 2, 2002, pp. 24-26. |
| Nisisako et al., Formation of droplets using branch channels in a microfluidic circuit, Proceedings of the SICE Annual Conference. International Session Papers 1262-1264 (2002). |
| Nisisako et al., Controlled formulation of monodisperse double emulsions in a multiple-phase microluidic system, Sot Matter, 1:23-27 (2005). |
| Nisisako et al., Microstructuerd Devices for Preparing Controlled Multiple Emulsions. Chem. Eng. Technol 31(8):1091-1098 (2008). |
| Nissim, A. et al., Antibody fragments from a {single pot{ phage display library as immunochemical reagents, Embo J, 13:692-8 (1994). |
| Nof and Shea, Drug-releasing scaffolds fabricated from drug-loaded microspheres, J. Biomed Mater Res 59:349-356 (2002). |
| Norman, A., Flow Cytometry, Med. Phys., 7(6):609-615 (1980). |
| Oberholzer et al., Enzymatic RNA replication in self-reproducing vesicles: an approach to a minimal cell, Biochem Biophys Res Commun 207(1):250-7 (1995). |
| Oberholzer et al., Polymerase chain reaction in liposomes, Chem. Biol. 2(10):677-82 (1995). |
| Obukowicz, M.G. et al., Secretion and export of IGF-1 in Escerichia coli strain JM101, Mol Gen Genet, 215:19-25 (1988). |
| Ogura, Y., Catalase activity at high concentrations of hydrogen peroxide, Archs Biochem Biophys, 57: 288-300 (1955). |
| Oh et al., Distribution of Macropores in Silica Particles Prepared by Using Multiple Emulsions, Journal of Colloid and Interface Science, 254(1): 79-86 (2002). |
| Okushima et al. Controlled production of monodisperse double emulsions by tWO-step droplet breakup in microfluidic devices, Langmuir 20(23): 9905-8 (2004). |
| Olsen et ai., Function-based isolation of novel enzymes from a large library, Nat Bioteoltnol 13(10):1071-4 (2000). |
| Omburo, G.A. et al., Characterization of the zinc binding site of bacterial phosphotriesterase, J of Biological Chem, 267:13278-83 (1992). |
| Oroskar et al., Detection of immobilized amplicons by ELISA-like techniques, Clin. Chem. 42:1547-1555 (1996). |
| Ostermeier, M. et al., A combinatorial approach to hybrid enzymes independent of DNA homology, Nat Biotechnol, 17(12):1205-9 (1999). |
| Ouelette, A new wave of microfluidic devices, Indust Physicist pp. 14-17 (2003). |
| Pabit et al., Laminar-Flow Fluid Mixer for Fast Fluorescence Kinetics Studies, Biophys J 83:2872-2878 (2002). |
| Paddison et al., Stable suppression of gene expression by RNAi in mammalian cells, PNAS 99(3):1443-1448 (2002). |
| Pannacci et al., Equilibrium and Nonequilibrium States in Microluidic Double Emulsions Physical Review Leters, 101(16):164502 (2008). |
| Park et al., Cylindrical compact thermal-cycling device for continuous-flow polymeras chain reaction, Anal Chem, ACS, 75:6029-33 (2003). |
| Park et al., Model of Formation of Monodispersed Colloids, J. Phys. Chem. B 105:11630-11635 (2001). |
| Parker et al., Development of high throughput screening assays using fluorescence polarization: nuclear receptor-ligand-binding and kinase/phosphatase assays, J Biomol Screen, 5(2): 77-88 (2000). |
| Parmley et al., Antibody-selectable filamentous fd phage vectors: affinity purification of target genes. Gene 73(2):305-18 (1988). |
| Pedersen et al., A method for directed evolution and functional cloning of enzymes, PNAS 95(18):10523-8 (1998). |
| Pelham and Jackson, An efficient mRNA-dependent translation system from reticulocyte lysates, Eur J Biochem 67:247-56 (1976). |
| Pelletier et al., An in vivo library-versus-library selection of optimized protein-protein interactions, Nature Biotechnology, 17:683-90 (1999). |
| Peng et al., Controlled Production of Emulsions Using a Crossflow Membrane, Particle & Particle Systems Characterization 15:21-25 (1998). |
| Perelson et al., Theorectical studies of clonal selection: minimal antibody repertoire size and relaibility of self-non-self discrimination. J Theor Biol 81(4):645-70 (1979). |
| Perez-Gilabert et al., Application of active-phase plot to the kinetic analysis of lipoxygenase in reverse micelles, Biochemistry J. 288:1011-1015 (1992). |
| Perrin, J., Polarisation de la lumiere de fluorescence vie moyenne des molecules dans I{etat excite, J. Phys. Rad. 1:390-401 (1926). |
| Petrounia, I.P. et al., Designed evolution of enzymatic properties, Curr Opin Biotechnol, 11:325-330 (2000). |
| Piemi et al., Transdermal delivery of glucose through hairless rat skin in vitro: effect of multiple and simple emulsions, Int J Pharm, 171:207-215 (1998). |
| Pirrung et al., A General Method for the Spatially De?ned Immobilization of Biomolecules on Glass Surfaces Using ‘Caged’ Biotin, Bioconjug Chem 7: 317-321 (1996). |
| Ploem, in Fluorescent and Luminescent Probes for Biological Activity Mason, T. G. Ed., Academic Press, Landon, pp. 1-11, 1993. |
| Pluckthun, A. et al., In vitro selection and evolution of proteins, Adv Protein Chem, 55: 367-403 (2000). |
| Pollack et al., Electrowetting-based actuation of droplets for integrated microfluidics, Lab Chip 2:96-101 (2002). |
| Pollack et al., Selective chemical catalysis by an antibody, Science 234(4783):1570-3 (1986). |
| Pons et al, Synthesis of Near-Infrared-Emitting, Water-Soluble CdTeSe/CdZnS Core/Shell Quantum Dots, Chemistry of Materials 21(8):1418-1424 (2009). |
| Posner et al., Engineering specificity for folate into dihydrofolate reductase from Escherichia coli, Biochemistry, 35: 1653-63 (1996). |
| Poulin and Theil A priori prediction of tissue: plasma partition coefficients of drugs to facilitate the use of physiologically-based pharmokinetic models in drug discovery, J Pharm Sci 89(1):16-35 (2000). |
| Priest, et al. Generation of Monodisperse Gel Emulsions in a Microfluidic Device, Applied Physics Letters, 88:024106 (2006). |
| Qi et al., Acid Beta-Glucosidase: Intrinsic Fluorescence and Conformational Changes Induced by Phospholipids and Saposin C, Biochem., 37(33): 11544-11554 (1998). |
| Raghuraman et al., Emulston Liquid Membranes for Wastewater Treatment: Equillibrium Models for Some Typical Metal-Extractant Systems,Environ. Sci. Technol 28:1090-1098 (1994). |
| Ralhan, Discovery and Verification of Head-and-neck Cancer Biomarkers by Differential Protein Expression Analysis Using iTRAQ Labeling, Multidimensional Liquid Chromatography, and Tandem Mass Spectrometry, Mol Cell Proteomics 7(6):1162-1173 (2008). |
| Ramsey, J.M., The burgeoning power of the shrinking laboratory, Nat Biotechnol 17(11):1061-2 (1999). |
| Ramstrom and Lehn, Drug discovery by dynamic combinatorial libraries, Nat Rev Drug Discov 1:26-36 (2002). |
| Raushel, F.M. et al., Phosphotriesterase: an enzyme in search of its natural substrate, Adv Enzymol Relat Areas Mol Biol, 74: 51-93 (2000). |
| Rech et al., Introduction of a yeast artificial chromosome vector into Sarrachomyeces cervesia by electroporation, Nucleic Acids Res 18:1313 (1990). |
| Reyes et al., Micro Total Analysis Systems. 1. Introduction, Theory and Technology, Anal Chem 74(12):2623-2636 (2002). |
| Riess, J.S., Fluorous micro- and nanophases with a biomedical perspective, Tetrahedron 58(20):4113-4131 (2002). |
| Roach et al., Controlling nonspeci?c protein adsorption in a plug-based micro?uidic system by controlling inteifacial chemistry using ?uorous-phase surfactants, Anal. Chem. 77:785-796 (2005). |
| Roberts, J.W.,Termination factor for RNA synthesis, Nature, 224: 1168-74 (1969). |
| Roberts et al., Simian virus 40 DNA directs synthesis of authentic viral polypeptides in a linked transcription-translation cell-free system 72(5):1922-1926 (1975). |
| Roberts, et al., RNA-peptide fusion for the in vitro selection of peptides and proteins, PNAS 94:12297-302 (1997). |
| Roberts, R.W. Totally in vitro protein selection using mRNA-protein fusions and ribosome display. Curr Opin Chem Biol 3(3), 268-73 (1999). |
| Roberts & Ja, In vitro selection of nucleic acids and proteins: What are we learning?, Curr Opin Struct Biol 9(4): 521-9 (1999). |
| Rodriguez-Antona et al., Quantitative RT-PCR measurement of human cytochrome P-450s: application to drug induction studies. Arch. Biochem. Biophys., 376:109-116 (2000). |
| Rolland et al., Fluorescence Polarization Assay by Flow Cytometry, J. Immunol. Meth., 76(1): 1-10 (1985). |
| Rosenberg et al.,Termination of transcription in bacteriophage lambda, J Biol Chem, 250: 4755-64 (1975). |
| Rosenberry, T.L., Acetylcholinesterase, Adv Enzymol Relat Areas Mol Biol, 43: 103-218 (1975). |
| Rotman, Measurement of activities of single molecules of beta-galactosidase, PNAS, 47:1981-91 (1961). |
| Russon et al., Single-nucleotide polymorphism analysis by allele-specific extension of fluorescently labeled nucleotides in a microfluidic flow-through device, Electrophoresis, 24:158-61 (2003). |
| Sadtler et al., Achieving stable, reverse water-in-fluorocarbon emulsions. Angew Chem Int Ed 35:1976-1978 (1996). |
| Saiki, R.K, et al, Primer directed enzymatic amplification of DNA with a thermostable DNA polymerase. Science 239(4839):487-91 (1988). |
| Sanchez et al., Breakup of Charged Capillary Jets, Bulletin of the American Physical Society Division of Fluid Dynamics 41:1768-1768 (1996). |
| Sano, T. et al., Immuno-PCR-Very sensitive antigen-detection by means of sepcific antibody-DNA conjugates. Science 258(5079), 120-122 (1992). |
| SantaLucia, A unified view of polymer, dumbbell, and oligonucleotide DNA nearest-neighbor thermodynamics, PNAS 95(4):1460-5 (1998). |
| Santra et al., Fluorescence lifetime measurements to determine the core-shell nanostructure of FITC-doped silica nanoparticles: An optical approach to evaluate nanoparticle photostability, J Luminescence 117(1):75-82 (2006). |
| Schatz et al., Screening of peptide libraries linked to lac repressor, Methods Enzymol 267: 171-91 (1996). |
| Schneegass et al., Miniaturized flow-through PCR with different template types in a silicone chip thermocycler, Lab on a Chip, Royal Soc of Chem, 1:42-9 (2001). |
| Schubert et al., Designer Capsules, Nat Med 8:1362 (2002). |
| Schweitzer et al., Immunoassays with rolling circle DNA amplification: A versatile platform for ultrasensitive antigen detection, PNAS 97(18), 10113-10119 (2000). |
| Schweitzer, B. et al., Combining nucleic acid amplification and detection. Curr Opin Biotechnol 12(1):21-7 (2001). |
| Scott, R.L., The Solubility of Fluorocarbons, J. Am. Chem. Soc, 70: 4090-4093 (1948). |
| Seethala and Menzel, Homogeneous, Fluorescence Polarization Assay for Src-Family Tyrosine Kinases, Anal Biochem 253(2):210-218 (1997). |
| Seiler et al., Planar glass chips for capillary electrophoresis: repetitive sample injection, quantitation, and separation efficiency, Anal Chem 65(10):1481-1488 (1993). |
| Selwyn M. J., A simple test for inactivation of an enzyme during assay, Biochim Biophys Acta 105:193-195 (1965). |
| Seo et al., Microfluidic consecutive flow-focusing droplet generators, Soft Matter, 3:986-992 (2007). |
| Seong et al., Fabrication of Microchambers Defined by Photopolymerized Hydrogels and Weirs Within Microfluidic Systems: Application to DNA Hybridization, Analytical Chem 74(14):3372-3377 (2002). |
| Seong and Crooks, Efficient Mixing and Reactions Within Microfluidic Channels Using Microbead-Supported Catalysts, J Am Chem Soc 124(45):13360-1 (2002). |
| Sepp et al., Microbead display by in vitro compartmentalisation: selection for binding using flow cytometry, FEBS Letters 532:455-58 (2002). |
| Serpersu et al., Reversible and irreversible modification of erythrocyte membranse permeability by electric field, Biochim Biophys Acta 812(3):779-785 (1985). |
| Shapiro, H.M., Multistation multiparameter flow cytometry: a critical review and rationale, Cytometry 3: 227-243 (1983). |
| Shestopalov et al., Multi-Step Synthesis of Nanoparticles Performed on Millisecond Time Scale in a Microfluidic Droplet-Based System, the Royal Society of Chemistry 4:316-321, 2004. |
| Shtern V, and Hussain F., Hysteresis in swirling jets, J. Fluid Mech. 309:1-44 (1996). |
| Sia &Whitesides, Micro?uidic devices fabricated in poly(dimethylsiloxane) for biological studies, Electrophoresis 24(21):3563-3576 (2003). |
| Sidhu, S.S., Phage display in pharmaceutical biotechnology, Curr Opin Biotech 11:610-616 (2000). |
| Siemering et al., Mutations that suppress the thermosensitivity of green fluorescent protein, Current Biology 6:1653-1663 (1996). |
| Silva-Cunha et al., W/O/W multiple emulsions of insulin containing a protease inhibitor and an absorption enhancer: biological activity after oral administration to normal and diabetic rats, Int J Pharm 169:33-44 (1998). |
| Sims et al., Immunopolymerase chain reaction using real-time polymerase chain reaction for detection, Anal. Biochem. 281(2):230-2 (2000). |
| Slappendel et al., Normal cations and abnormal membrane lipids in the red blood cells of dogs with familial stomatocytosis hypertrophic gastritis, Blood 84:904-909 (1994). |
| Slob et al., Structural identifiability of PBPK models: practical consequences for modeling strategies and study designs, Crit Rev Toxicol. 27(3):261-72 (1997). |
| Smith et al., The synthesis of oligonucleotides containing an aliphatic amino group at the 5{terminus: synthesis of fluorescent DNA primers for use in DNA sequence analysis, Nucl. Acid Res. 13:2399-2412 (1985). |
| Smith G.P., Filamentous fusion phage: novel expression vectors that display cloned antigens on the virion surface, Science 228(4705): 1315-7(1985). |
| Smith et al., Fluorescence detection in automated DNA sequence analysis, Nature 321 :674-679. |
| Smith et al., Direct mechanical measurements of the elasticity of single DNA molecules by using magnetic beads, Science 258(5085):1122-1126 (1992). |
| Smith et al., Phage display, Chemical Reviews 97(2), 391-410 (1997). |
| Smyth et al., Markers of apoptosis: methods for elucidating the mechanism of apoptotic cell death from the nervous system, Biotechniques 32:648-665 (2000). |
| Sohn, et al, Capacitance cytometry: Measuring biological cells one by one, PNAS 97(20):10687-10690 (2000). |
| Somasundaram and Ramalingam, Gain studies of Rhodamine 6G dye doped polymer laser, J Photochem Photobiol 125(1-3):93-98 (1999). |
| Song, H. and Ismagilov, R.F., Millisecond kinetics on a microluidic chip using nanoliters of reagents, J Am Chem Soc. 125: 14613-14619 (2003). |
| Song et al., A microfluidic system for controlling reaction netWO rks in time, Angew. Chem. Int. Ed. 42(7):768-772 (2003). |
| Song et al., Experimental Test of Scaling of Mixing by Chaotic Advection in Droplets Moving Through Microfluidic Channels, App Phy Lett 83(22):4664-4666 (2003). |
| Soni and Meller, Progress toward ultrafast DNA sequencing using solid-state nanopores, Clin Chem 53:1996-2001 (2007). |
| Soumillion et al., Selection of B-lactomase on filamentous bacteriophage by catalytic activity, J Mol Biol, 237:415-22 (1994). |
| Soumillion et al., Novel concepts for the selection of catalytic activity. Curr Opin Biotechnol 12:387-394 (2001). |
| Sproat et al., The synthesis of protected 5′-mercapto-2′,5′-dideoxyribonucleoside-3′-0-phosphorainidites, uses of 5′-mercapto-oligodeoxyribonucleotides, Nucleic Acids Res 15:4837-4848 (1987). |
| Stauber, et a., Rapid generation of monoclonal antibody-secreting hybridomas against African horse sickness virus by in vitro immunization and the fusion/cloning technique, J. Immunol. Meth 161(2):157-168 (1993). |
| Stemmer, W.P., DNA shuffling by random fragmentation and reassembly: in vitro recombination for molecular evolution. PNAS 91(22):10747-51(1994). |
| Stemmer, W.P., Rapid evolution of a protein in vitro by DNA shuffling, Nature 370(6488):389-91 (1994). |
| Stober et al., Controlled growth of monodisperse silica spheres in the micron size range, J Colloid and Interface Sci 26(1):62-69 (1968). |
| Stofko, H.R. et al., A single step purification for recombinant proteins. Characterization of microtube associated protein (MAP2) fragment which associates with the type II cAMP-dependent protein kinase, Febs Lett 302: 274-278 (1992). |
| Strizhkov et al., PCR amplification on a microarray of gel-immobilized oligonucleotides: Detection of bacterial toxin- and drug-resistant genes and their mutations, BioTechniques 29(4):844-857 (2000). |
| Stroock et al., Chaotic mixer for microchannels, Science 295(5555):647-651 (2002). |
| Studer et al., Fluorous Synthesis: A Fluorous-Phase Strategy for Improving Separation Efficiency in Organic Synthesis, Science 275: 823-826 (1997). |
| Sugiura et al., Effect of Channel Structure on MicroChannel Emuisification, Langmuir 18:5708-5712 (2002). |
| Sugiura et al., Interfacial tension driven monodispersed droplet formation from mtcrofabricated channel array Langmuir, 17: 5562-5566 (2001). |
| Sundberg et al., Spatially-Addressable Immobilisation of Macromolecules on Solid Supports, J. Am. Chem. Soc, 117:12050-12057 (1995). |
| Suzuki et al., Random mutagenesis of thermus aquaticus DNA polmerase I: concordance of immutable sites in vivo with the crystal structure, PNAS USA, 93:96701-9675 (1996). |
| Szostak, J.W., In vitro selection of functional nucleic acids. Ann. Rev. Biochem. 68, 611-647 (1999). |
| Takayama et al., Patterning Cells and Their Environments Using Multiple Laminar Fluid Flows in Capillary NetWO rks, PNAS 96:5545-5548 (1999). |
| Takeuchi et al., An Axisymmetric Flow-Focusing Microfluidic Device, Adv. Mater 17(8):1067-1072 (2005). |
| Tan, Y.C., Monodisperse Droplet Emulsions in Co-Flow Microfluidic Channels, Micro TAS, Lake Tahoe (2003). |
| Tan, Y.C., Microfluidic Liposome Generation from Monodisperse Droplet Emulsion-Towards the Realization of Artificial Cells, Summer Bioengineering Conference, Florida (2003). |
| Tan et al., Controlled Fission of Droplet Emulsions in Bifurcating Microfluidic Channels, Transducers Boston (2003). |
| Tan et al., Design of microluidic channel geometries for the control of droplet volume, chemical concentration, and sorting, Lab Chip, 4(4): 292-298 (2004). |
| Tan et al., Monodispersed micro?uidic droplet generation by shear focusing micro?uidic device, Sensors and Actuators 114:350-356 (2006). |
| Tanaka et al., Ethanol Production from Starch by a Coimmobilized Mixed Culture System of Aspergillus awamori and Zymomonas mobilis, Biotechnol Bioeng XXVII:1761-1768 (1986). |
| Tang et al., A multi-color fast-switching microfluidic droplet dye laser, Lab Chip 9:2767-2771 (2009). |
| Taniguchi et al., Chemical Reactions in Microdroplets by Electrostatic Manipulation of Droplets in Liquid Media, Lab on a Chip 2:19-23 (2002). |
| Tawfik et al., catELISA: a facile general route to catalytic antibodies, PNAS 90(2):373-7 (1993). |
| Tawfik, D.S. et al., 1,8-diabycyclo[5.4.0]undecane mediated transesterification of p-nitrophenyl phosphonates—a novel route to phosphono esters, Synthesis-Stuttgart, 10: 968-972 (1993). |
| Tawfik et al., Efficient and selective p-nitrophenyl-ester=hydrolyzing antibodies elicited by a p-nitrobenzyl phosphonate hapten, Eur J Biochem, 244:619-26 (1997). |
| Tawfik et al., Man-made cell-like compartments for molecular evolution, Nature Biotechnology, 7(16):652-56 (1998). |
| Taylor et al., Characterization of chemisorbed monolayers by surface potential measurments, J. Phys. D. Appl. Phys. 24:1443 (1991). |
| Tchagang et al., Early detection of ovarian cancer using group biomarkers, Mol Cancer Ther 7:27-37 (2008). |
| Tencza et al., Development of a Fluorescence Polarization-Based Diagnostic Assay for Equine Infectious Anemia Virus, J Clinical Microbiol 38(5):1854-185 (2000). |
| Terray, et al, Fabrication of linear colloidal structures for microfluidic applications, Applied Phys Lett 81(9):1555-1557 (2002). |
| Terray et al., Microluidic Control Using Colloidal Devices,Science, 296(5574):1841-1844 (2002). |
| Tewhey et al., Microdroplet-based PCR amplification for large scale targeted sequencing, Nat Biotechnol 27(11):1025-1031 (2009). |
| Thompson, L.F., Introduction to Lithography, ACS Symposium Series 219:1-13, (1983). |
| Thorsen et al., Dynamic pattern formation in a vesicle-generating microfluidic device, Phys Rev Lett 86(18):4163-4166 (2001). |
| Thorsen et al., Microfluidic Large-Scale Integration, Science 298:580-584 (2002). |
| Tice et al., Formation of droplets and mixing in multiphase microfluidics at low values of the reynolds and the capillary numbers, Langmuir 19:9127-9133 (2003). |
| Tice et al., Effects of viscosity on droplet formation and mixing in microfluidic channels, Analytica Chimica Acta 507:73-77 (2004). |
| Titomanlio et al., Capillary experiments of flow induced crystallization of HOPE{, AIChe Journal, 1990, v36, No. 1, pp. 13-18. |
| Tleugabulova et al., Evaluating formation and growth mechanisms of silica particles using fluorescence anisotropy decay analysis, Langmuir 20(14):5924-5932 (2004). |
| Tokatlidis et al., Nascent chains: folding and chaperone intraction during elongation on ribosomes, Philos Trans R Soc Lond B Biol Sci, 348:89-95 (1995). |
| Tokeshi et al., Continuous-Flow Chemical Processing on a Microchip by Combining Microunit Operations and a Multiphase Flow NetWO rk, Anal Chem 74(7):1565-1571 (2002). |
| Tokumitsu, H. et al., Preparation of gadopentetic acid-loaded chitosan microparticles for gadolinium neutron-capture therapy of cancer by a novel emulsion-droplet coalescence technique, Chem and Pharm Bull 47(6):838-842 (1999). |
| Tramontano, A., Catalytic antibodies, Science 234(4783):1566-70 (1986). |
| Trindade, T., Nanocrystalline semiconductors: synthesis, properties, and perspectives, Chem. Mat. 13:3843-3858 (2001). |
| Tripet, B. et al., Engineering a de novo-designed coiled-coil heterodimerization domain off the rapid detection, purification and characterization of recombinantly expressed peptides and proteins, Protein Engng., 9:1029-42 (1996). |
| Tuerk, C. and Gold, L., Systematic Evolution of Ligands by Exponentid Enrichment: RNA Ligands to Bacteriophage T4 DNA Polymerase, Science, 249:505-10 (1990). |
| Umbanhowar et al., Monodisperse Emulsion Generation via Drop Break Off in a Coflowing Stream, Langmuir 16(2):347-351 (2000). |
| Unger et al., Monolithic microfabricated valves and pumps by multylayer soft lithography, Science 288(5463):113-116 (2000). |
| Utada, A. et al., Monodisperse double emulsions generated from a microcapillary device, Science, 308:537-541 (2005). |
| Vainshtein et al., Peptide rescue of an N-terminal truncation of the stoffel fragment of Tag DNA polymerase, Protein Science, 5:1785-92 (1996). |
| Van Bockstaele et al., Prognostic markers in chronic lymphocytic leukemia: a comprehensive review, Blood Rev 23(1):25-47 (2009). |
| Van Dilla et al., The fluorescent cell photometer: a new method for the rapid measurement of biological cells stained with fluorescent dyes, Annual Report of the Los Alamos Scientific Laboratory of the University of California (Los Alamos, NM), Biological and Medical Research Groupp (H-4) of the Health Division, Compiled by D. G. Ott, pp. 100-105, distributed Jan. 23, 1968. |
| Van Dilla et al., Cell Microfluorometry: A Method for Rapid Fluorescence Measurement, Science 163(3872):1213-1214 (1969). |
| Vanhooke et al., Three-dimensional structure of the zinc-containing phosphotrieesterase with the bound substrate analog diethy 4-methylbenzylphosphonate, Biochemistry 35:6020-6025 (1996). |
| Varga, J.M. et al., Mechanism of allergic cross-reactions-I. Multispecific binding of ligands to a mouse monoclonal anti-DNP IgE antibody. Mol Immunol 28(6), 641-54 (1991). |
| Vary, A homogeneous nucleic acid hybridization assay based on strand displacement, Nucl Acids Res 15(17):6883-6897 (1987). |
| Venkateswaran et al., Production of Anti-Fibroblast Growth Factor Receptor Monoclonal Antibodies by in Vitro Immunization, Hybirdoma, 11(6):729-739 (1992). |
| Venter et al., The sequence of the human genome, Science 291(5507):1304-51 (2001). |
| Vogelstein et al., Digital PCR, PNAS 96(16):9236-9241 (1999). |
| Voss, E.W., Kinetic measurements of molecular interactions by spectrofluorometry, J Mol Recognit, 6:51-58 (1993). |
| Wahler, D. et al., Novel methods for biocatalyst screening. Curr Opin Chem Biol, 5: 152-158 (2001). |
| Walde, P. et al., Structure and activity of trypsin in reverse micelles, Eur J Biochem, 173(2):401-9 (1988). |
| Walde, P. et al., Spectroscopic and kinetic studies of lipases solubilized in reverse micelles, Biochemistry, 32(15):4029-34 (1993). |
| Walker et al., Strand displacement amplification—an isothermal, in vitro DNA amplification technique, Nucleic Acid Res, 20(7):1691-6 (1992). |
| Walker et al., Isothermal in vitro amplification of DNA by a restriction enzyme/DNA polymerase system, PNAS 89(1):392-6 (1992). |
| Wang, A.M. et al., Quantitation of mRNA by the polymerase chain reaction. Proc natl Aced Sci USA 86(24), 9717-21 (1989). |
| Wang, G.T. et al., Design and synthesis of new fluorogenic HIV protease substrates based on resonance energy transfer, Tetrahedron Lett., 31:6493 (1990). |
| Wang et al., Preparation of Titania Particles Utilizing the Insoluble Phase Interface in a MicroChannel Reactor, Chemical Communications 14:1462-1463 (2002). |
| Wang et al., DEP actuated nanoliter droplet dispensing using feedback control, Lab on a Chip 9:901-909 (2008). |
| Warburton, B., Microcapsules for Multiple Emulsions, Encapsulation and Controlled Release, Spec Publ R Soc Chem, 35-51 (1993). |
| Weil. et al., Selective and accurate initiation of transcription at the Ad2 major late promotor in a soluble system dependent on purified RNA polymerase II and DNA, Cell, 18(2):469-84 (1979). |
| Wetmur et al., Molecular haplotyping by linking emulsion PCR: analysis of paraoxonase 1 haplotypes and phenotypes, Nucleic Acids Res 33(8):2615-2619 (2005). |
| Wick et al., Enzyme-containing liposomes can endogenously produce membrane-constituting lipids, Chem Biol 3(4):277-85 (1996). |
| Widersten and Mannervik, Glutathione Transferases with Novel Active Sites Isolated by Phage Display from a Library of Random Mutants, J Mol Biol 250(2):115-22 (1995). |
| Wiggins et al., Foundations of chaotic mixing, Philos Transact A Math Phys Eng Sci 362(1818):937-70 (2004). |
| Williams et al., Methotrexate, a high-affinity pseudosubstrate of dihydrofolate reductase, Biochemistry, 18(12):2567-73 (1979). |
| Williams et al., Amplification of complex gene libraries by emulsion PCR, Nature Methods 3(7):545-550 (2006). |
| Wilson, D.S. and Szostak, J.W., In vitro selection of functional nucleic acids, Ann. Rev. Biochem. 68: 611-647 (1999). |
| Winter et al., Making antibodies by phage display technology, Annu Rev Immunol 12:433-55 (1994). |
| Wittrup, K.D., Protein engineering by cell-surface display. Curr Opin Biotechnology, 12: 395-399 (2001). |
| Wolff et al., Integrating advanced functionality in a microfabricated high-throughput fluorescent-activated cell sorter, Lab Chip, 3(1): 22-27 (2003). |
| Wronski et al., Two-color, fluorescence-based microplate assay for apoptosis detection. Biotechniques, 32:666-668 (2002). |
| Wu et al., The ligation amplification reaction (LAR)-amplification of specific DNA sequences using sequential rounds of template-dependent ligation, Genomics 4(4):560-9 (1989). |
| Wyatt et al., Synthesis and purification of large amounts of RNA oligonucleotides, Biotechniques 11(6):764-9 (1991). |
| Xia and Whitesides, Soft Lithography, Angew. Chem. Int. Ed. 37:550-575 (1998). |
| Xia and Whitesides, Soft Lithography, Ann. Rev. Mat. Sci. 28:153-184 (1998). |
| Xu, S. et al., Generation of monodisperse particles by using microfluidics: control over size, shape, and composition, Angew. Chem. Int. Ed. 44:724-728 (2005). |
| Yamagishi, J. et al., Mutational analysis of structure-activity relationships in human tumor necrosis factor-alpha, Protein Eng, 3:713-9 (1990). |
| Yamaguchi et al., Insulin-loaded biodegradable PLGA microcapsules: initial burst release controlled by hydrophilic additives, Journal of Controlled Release, 81(3): 235-249 (2002). |
| Komatsu et al., Roles of cytochromes P450 1A2, 2A6, and 2C8 in 5-fluorouracil formation rom tegafur, an anticancer prodrug, in human liver microsomes. Drug Met. Disp., 28:1457-1463 (2001). |
| Yershov et al., DNA analysis and diagnostics on oligonucleotide microchips, PNAS 93(10):4913-4918 (1996). |
| Yonezawa et al., DNA display for in vitro selection of diverse peptide libraries, Nucleic Acids Research, 31(19): e118 (2203). |
| Yu et al., Specific inhibition of PCR by Non-Extendable Oligonucleotides Using a 5′ to 3′ Exonuclease-Defcient DNA Polymerase, Biotechniques 23(4):714-6, 718-20 (1997). |
| Yu et al. Responsive biomimetic hydrogel valve for microfluidics. Appl. Phys. Lett 78:2589-2591 (2001). |
| Yu et al., Quantum dot and silica nanoparticle doped polymer optical fibers, Optics Express 15(16):9989-9994 (2007). |
| Zaccolo, M. et al., An approach to random mutagenesis of DNA using mixtures of triphosphate derivatives of nucleoside analogues. J Mol Biol 255(4):589-603 (1996). |
| Zakrzewski, S.F., Preparation of tritiated dihydrofolic acid of high specific activity, Methods Enzymol, 539 (1980). |
| Zaug and Cech, The Tetrahymena intervening sequence ribonucleic acid enzyme is a phosphotransferase and an acid phosphatase, Biochemistry 25(16):4478-82 (1986). |
| Zaug et al., The Tetrahymena ribozyme acts like an RNA restriction endonuclease, Nature 324(6096):429-33 (1986). |
| Zaug and Cech, The intervening sequence RNA of Tetrahymena is an enzyme, Science 231(4737):470-5 (1986). |
| Zhang, Z.Y., Substrate specificity of the protein tyrosine phosphatases, PNAS 90: 4446-4450 (1993). |
| Zhang et al., A Simple Statistical Parameter for Use in Evaluation and Validation of High Throughput Screening Assays, Journal of Biomolecular Screening, 4(2): 67-73 (1999). |
| Zhao, H. et al., Molecular evolution by staggered extension process (StEP) in vitro recombination. Nat Biotechnol 16(3):258-61 (1998). |
| Zhao, B. et al., Control and Applications of Immiscible Liquids in Microchannels, J. Am. Chem. Soc, vol. 124:5284-5285 (2002). |
| Zheng et al., Screening of Protein Crystallization Conditions on a Microfluidic Chip Using Nanoliter-Size Droplets, J Am Chem Soc 125(37):11170-11171 (2003). |
| Zheng et al., Formation of Droplets of Alternating Composition in Microfluidic Channels and Applications to Indexing of Concentrations in Droplet-Based /Assays, Anal. Chem., 2004, v. 76, pp. 4977-4982. |
| Zheng et al., A Droplet-Based, Composite PDMS/Glass Capillary Microfluidic System for Evaluating Protein Crystallization Conditions by Microbatch and Vapor-Diffusion Methods with On-Chip X-Ray Diffraction, Angew. Chem., pp. 1-4, 2004. |
| Zheng et al., A Microiuidic Approach for Screening Submicroliter Volumes against Multiple Reagents by Using Performed Arrays of Nanoliter Plugs in a Three-Phase Liquid/Liquid/Gas Flow, Angew. Chem. Int. Ed., 44(17): 2520-2523 (2005). |
| Zimmermann et al., Dielectric Breakdown of Cell Membranes, Biophys J 14(11):881-889 (1974). |
| Zimmermann et al., Microscale Production of Hybridomas by Hypo-Osmolar Electrofusion, Hum. Antibod. Hybridomas, 3(1): 14-18 (1992). |
| Zubay, G., In vitro synthesis of protein in microbial systems, Annu Rev Genet, 7: 267-87 (1973). |
| Zubay, G., The isolation and properties of CAP, the catabolite gene activator, Methods Enzymol, 65: 856-77 (1980). |
| Zuckermann, R. et al., Efficient Methods for Attachment of Thiol-Specific Probes to the 3{-end of Synthetic Oligodeoxyribonucleotides, Nucleic Acids Res. 15:5305-5321 (1987). |
| ISR and Written Opinion in PCT/EP2010/065188, Jan. 12, 2011. |
| ISR and Written Opinion in PCT/US01/18400 (Jan. 28, 2005). |
| ISR and Written Opinion in PCT/US11/24615. |
| ISR and Written Opinion in PCT/US2004/010903 (Dec. 20, 2004). |
| ISR and Written Opinion in PCT/US2006/021286. |
| ISR and Written Opinion in PCT/US2007/002063 (11/15/07). |
| ISR and Written Opinion in PCT/US2009/050931 (Nov 26, 2009). |
| Extended European Search Report for EP 10181911.8 mailed Jun. 1, 2011. |
| Extended European Search Report for EP 10184514.7 mailed Dec. 20, 2010. |
| International Preliminary Report on Patentability mailed Sep. 20, 2007, for PCT/US2006/007772. |
| Japanese Office Action for JP 2006-509830 mailed Jun. 1, 2011. |
| Office Action for U.S. Appl. No. 11/246,911 mailed Feb. 8, 2011. |
| Advisory Action for U.S. Appl. No. 11/360,845, mailed Jun. 14, 2010. |
| Office Action for U.S. Appl. No. 11/360,845 mailed Aug. 4, 2010. |
| Office Action for U.S. Appl. No. 11/360,845 mailed Apr. 26, 2011. |
| Advisory Action for U.S. Appl. No. 11/698,298 mailed May 20, 2011. |
| Office Action for U.S. Appl. No. 11/698,298, mailed Jun. 29, 2011. |
| Chiang, C.M. et al., Expression and purification of general transcription factors by FLAG epitope-tagging and peptide elution, Pept Res, 6: 62-64 (1993). |
| Courrier et al., Reverse water-in-fluorocarbon emulsions and microemulsions obtained with a fiuorinated surfactant, Colloids and Surfaces A: Physicochem. Eng. Aspects 244:141-148 (2004). |
| Garstecki, etal., Formation of monodisperse bubbles in a microfiuidic fiow-focusing device, Appl Phys Lett 85(13):2649-2651 (2004). |
| Lee et al., Circulating fiows inside a drop under time-periodic non-uniform electric fields, Phys Fuilds 12(8):1899-1910 (2000). |
| Mackenzie, IABS Symposium on Reduction of Animal Usage in the Development and Control of Biological Products, London, UK, 1985. |
| Mueth et al., Origin of stratification in creaming emulsions, Physical Review Letters 77(3):578-581 (1996). |
| Mulder et al., Characterization of tWO human monoclonal antibodies reactive with HLA-B12 and HLA-B60, respectively, raised by in vitro secondary immunization of peripheral blood lymphocytes, Hum. Immunol 36(3):186-192 (1993). |
| Nakano et al., High speed polymerase chain reaction in constant flow, Biosci Biotech and Biochem, 58:349-52 (1994). |
| Stone et al., Engineering flows in small devices: Microfluidics toward a lab-on-a-chip, Ann. Rev. Fluid Mech. 36:381-441 (2004). |
| Sung et al. Chip-based microfluidic devices coupled with electrospray ionization-mass spectrometry, Electrophoresis 26:1783-1791 (2005). |
| Tabatabai and Faghri, A New Two-Phase Flow Map and Transition Boundary Accounting for Surface Tension Effects in Horizontal Miniature and Micro Tubes, J Heat Transfer 123:958-968 (2001). |
| Tabatabai et al, Economic feasability study of polyelectrolyte-enhanced ultrafiltration (PEUF) for water softening, J Membrane Science 100(3):193-207 (1995). |
| Tabatabai et al., Reducing Surfactant Adsorption on Carbonate Reservoirs, SPE Resenroir Engineering 8(2):117-122 (1993). |
| Tabatabai, Water Softening Using polyelectrolyte-enhanced ultrafiltration, Separation Science Technology 30(2):211-224 (1995). |
| Taly et al., Droplets as Microreactors for High-Throughput Biology, Chembiochem 8(3):263-272 (2007). |
| Taylor, The formation of emulsions in definable field of flow, Proc R Soc London A 146(858):501-523 (1934). |
| Theberge et al., Microdroplets in Microfluidics: An Evolving Platform for Discoveries in Chemistry and Biology, Angew. Chem. Int. Ed 49(34):5846-5868 (2010). |
| Walde, P. et al., Oparin{s reactions revisited: enzymatic synthesis of poly(adenylic acid) in micelles and self-reproducing vesicles. J Am Chem Soc, 116: 7541-7547 (1994). |
| Wasserman et al., Structure and reactivity of allyl-siloxane monolayers formed by reaction of allcyltrichlorosilanes on silicon substrates, Langmuir 5:1074-1087 (1989). |
| Werle et al., Convenient single-step, one tube purification of PCR products for direct sequencing, Nucl Acids Res 22(20):4354-4355 (1994). |
| Yelamos, J. et al., Targeting of non-lg sequences in place of the V segment by somatic hypermutation. Nature 376(6537):225-9 (1995). |
| Sakamoto, 2005, Rapid and simple quantification of bacterial cells by using a microfluidic device, Appl Env Microb. |
| Number | Date | Country | |
|---|---|---|---|
| 20140295572 A1 | Oct 2014 | US |
| Number | Date | Country | |
|---|---|---|---|
| 60899849 | Feb 2007 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12525749 | US | |
| Child | 14294737 | US |
