Methods and apparati using single polymer analysis
First Claim
1. A method for analyzing a single nucleic acid molecule comprisingexposing a single nucleic acid molecule to at least two distinguishable detectable labels present on different unit specific markers for a time sufficient to allow the detectable labels to bind to the single nucleic acid molecule, andpassing the single nucleic acid molecule in flow through a diffraction-limited detection spot, thereby analyzing the single nucleic acid molecule for a coincident event using a single molecule detection system by detecting two separate and distinguishable signals from the at least two distinguishable detectable labels,wherein the single nucleic acid molecule is present at a concentration of 400 fM or greater, the coincidence event indicates that the at least two distinguishable detectable labels are bound to the single nucleic acid molecule, the coincident event is a color coincident event, and the method analyzes 20-20,000 single nucleic acid molecules per minute.
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Accused Products
Abstract
The invention relates to methods for analyzing and characterizing single polymers such as nucleic acid molecules. In preferred embodiments, the single molecules are analyzed using single molecule detection and analysis systems.
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Citations
28 Claims
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1. A method for analyzing a single nucleic acid molecule comprising
exposing a single nucleic acid molecule to at least two distinguishable detectable labels present on different unit specific markers for a time sufficient to allow the detectable labels to bind to the single nucleic acid molecule, and passing the single nucleic acid molecule in flow through a diffraction-limited detection spot, thereby analyzing the single nucleic acid molecule for a coincident event using a single molecule detection system by detecting two separate and distinguishable signals from the at least two distinguishable detectable labels, wherein the single nucleic acid molecule is present at a concentration of 400 fM or greater, the coincidence event indicates that the at least two distinguishable detectable labels are bound to the single nucleic acid molecule, the coincident event is a color coincident event, and the method analyzes 20-20,000 single nucleic acid molecules per minute.
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5. A method for analyzing a single nucleic acid molecule comprising exposing a single nucleic acid molecule to at least two distinguishable detectable labels for a time sufficient to allow the detectable labels to bind to the single nucleic acid molecule,
exposing the single nucleic acid molecule and detectable labels to a chemical or enzymatic single stranded cleavage reaction, and then analyzing the single nucleic acid molecule for a coincident event using a single molecule detection system by detecting two separate and distinguishable signals from the at least two distinguishable detectable labels, wherein the coincidence event indicates that the at least two distinguishable detectable labels are bound to the single nucleic acid molecule, and the coincident event is a color coincident event.
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15. A method for analyzing a single nucleic acid molecule comprising
exposing a single nucleic acid molecule to at least two distinguishable detectable labels for a time sufficient to allow the detectable labels to bind to the single nucleic acid molecule wherein the at least two distinguishable detectable labels are present on the same unit specific marker, analyzing the single nucleic acid molecule for a coincident event using a single molecule detection system wherein the coincidence event indicates that the at least two distinguishable detectable labels are bound to the single nucleic acid molecule, and exposing the single nucleic acid molecule to a third detectable label that binds specifically to a mismatch between the single nucleic acid molecule and the unit specific marker, wherein a coincident event between the first, second and third detectable labels is indicative of a mismatch.
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16. A method for analyzing a single nucleic acid molecule comprising
exposing a single nucleic acid molecule to at least two distinguishable detectable labels for a time sufficient to allow the detectable labels to bind to the single nucleic acid molecule, analyzing the single nucleic acid molecule for a coincident event using a single molecule detection system, and exposing the single nucleic acid molecule and detectable labels to an enzymatic single stranded cleavage reaction that uses RNase I prior to analyzing the single nucleic acid molecule, wherein the coincidence event indicates that the at least two distinguishable detectable labels are bound to the single nucleic acid molecule.
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17. A method for analyzing a single nucleic acid molecule comprising
exposing a single nucleic acid molecule to at least two distinguishable detectable labels for a time sufficient to allow the detectable labels to bind to the single nucleic acid molecule, analyzing the single nucleic acid molecule for a coincident event using a single molecule detection system, and exposing the single nucleic acid molecule and detectable labels to an enzymatic single stranded cleavage reaction that uses S1 nuclease prior to analyzing the single nucleic acid molecule, wherein the coincidence event indicates that the at least two distinguishable detectable labels are bound to the single nucleic acid molecule.
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18. A method for analyzing a single nucleic acid molecule comprising
exposing a single nucleic acid molecule to at least two distinguishable detectable labels for a time sufficient to allow the detectable labels to bind to the single nucleic acid molecule in the presence of a polymerase, a labeled unit specific marker and labeled nucleotides, provided the unit specific marker and nucleotides are differentially labeled with the at least two distinguishable detectable labels, and analyzing the single nucleic acid molecule for a coincident event using a single molecule detection system, wherein the coincidence event indicates that the at least two distinguishable detectable labels are bound to the single nucleic acid molecule.
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23. A method for analyzing a single nucleic acid molecule comprising
exposing a single nucleic acid molecule to at least two distinguishable detectable labels for a time sufficient to allow the detectable labels to bind to the single nucleic acid molecule in the presence of a polymerase, a labeled unit specific marker and labeled nucleotides, provided the unit specific marker and nucleotides are differentially labeled with the at least two distinguishable detectable labels that are a FRET fluorophore pair, and analyzing the single nucleic acid molecule for a coincident event using a single molecule detection system, wherein the coincidence event indicates that the at least two distinguishable detectable labels are bound to the single nucleic acid molecule.
Specification