Allele specific primer extension
First Claim
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1. A method of detecting a polymorphic site of a nucleic acid template comprising the steps of:
- (a) conducting a nucleic acid polymerase reaction in a solution comprising a nucleic acid template which contains a polymorphic site, an allele specific primer whose 3′
terminal base is complementary to the nucleotide of the polymorphic site of said nucleic acid template, two or more terminal phosphate-labeled nucleotides which are non-reactive to phosphatases, and a DNA polymerase so that a labeled polyphosphate is produced;
(b) mixing a phosphatase with said solution in step (a) and producing a labeled detectable species from said labeled polyphosphate;
(c) detecting said labeled detectable species wherein the detection of said labeled detectable species indicates the presence of the polymorphic site in said nucleic acid template.
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Abstract
A method of characterizing a nucleic acid sample is provided that includes the steps of: (a) conducting a DNA polymerase reaction that includes the reaction of a template, an allele specific primer, at least one terminal phosphate-labeled nucleotide, DNA polymerase, and optionally an enzyme having 3′→5′ exonuclease activity when the primer is non-hydrolyzable, which reaction results in the production of labeled polyphosphate; (b) permitting the labeled polyphosphate to react with a phosphatase to produce a detectable species; (c) detecting the detectable species; and (d) characterizing the nucleic acid sample based on such detection.
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19 Claims
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1. A method of detecting a polymorphic site of a nucleic acid template comprising the steps of:
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(a) conducting a nucleic acid polymerase reaction in a solution comprising a nucleic acid template which contains a polymorphic site, an allele specific primer whose 3′
terminal base is complementary to the nucleotide of the polymorphic site of said nucleic acid template, two or more terminal phosphate-labeled nucleotides which are non-reactive to phosphatases, and a DNA polymerase so that a labeled polyphosphate is produced;(b) mixing a phosphatase with said solution in step (a) and producing a labeled detectable species from said labeled polyphosphate; (c) detecting said labeled detectable species wherein the detection of said labeled detectable species indicates the presence of the polymorphic site in said nucleic acid template. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification