Single molecule detection systems and methods
First Claim
1. A microfluidic device useful for analyzing a reaction, the device comprising:
- a substrate;
at least two microchannels disposed on the substrate, wherein said microchannels are in fluid communication with each other;
an immobilization zone within a first one of said microchannels, wherein at least a portion of a reactant is immobilized proximal the immobilization zone to allow for a reaction to occur so as to produce a reaction product; and
a detection zone within a second one of said microchannels,wherein there is substantially no electric field within the first microchannel proximal the immobilization zone, and wherein a biasing force moves the reaction product into the detection zone within the second microchannel,wherein the reactant includes a charge-switch nucleotide probe, and wherein the probe is a nucleotide triphosphate and the terminal phosphate includes a fluorophore attached thereto.
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Accused Products
Abstract
A microfluidic system is provided that includes a substrate, a first microchannel disposed in the substrate for providing a reactant to a reaction zone, a second microchannel disposed in the substrate, and a third microchannel disposed in the substrate, the third microchannel providing fluid communication between the first and second microchannels. The system also typically includes first and second electrodes, positioned at opposite ends of the second microchannel, for providing an electric field within the second microchannel. In operation, when the reactant is in the reaction zone, a reaction product is produced having a net electric charge different from the electric charge of the reactant.
45 Citations
23 Claims
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1. A microfluidic device useful for analyzing a reaction, the device comprising:
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a substrate; at least two microchannels disposed on the substrate, wherein said microchannels are in fluid communication with each other; an immobilization zone within a first one of said microchannels, wherein at least a portion of a reactant is immobilized proximal the immobilization zone to allow for a reaction to occur so as to produce a reaction product; and a detection zone within a second one of said microchannels, wherein there is substantially no electric field within the first microchannel proximal the immobilization zone, and wherein a biasing force moves the reaction product into the detection zone within the second microchannel, wherein the reactant includes a charge-switch nucleotide probe, and wherein the probe is a nucleotide triphosphate and the terminal phosphate includes a fluorophore attached thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification