Restriction endonuclease enhanced polymorphic sequence detection
First Claim
1. A method for detecting in nucleic acid from a sample the presence or absence of an allele of paternal origin, comprising:
- a) cleaving nucleic acid from the sample with a Tsp509I restriction enzyme;
b) exposing the nucleic acid after (a) to amplification conditions that amplify uncleaved nucleic acid but not cleaved nucleic acid, and which amplification conditions are capable of generating amplification products comprising some or all of the single nucleotide polymorphic loci selected from the group consisting of;
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Abstract
Provided in part herein is an improved method for the detection of specific polymorphic alleles in a mixed DNA population. The method comprises enriching the relative percentage of a given polymorphic allele that is exponentially amplifiable by PCR. Provided also are methods for selectively enriching target nucleic acid, for example, fetal nucleic acid in a maternal sample. In the case of detecting fetal nucleic acid in a maternal sample, a restriction enzyme is introduced that can discriminate between the alleles of a polymorphic site. In some embodiments, the maternal allele is digested and nucleic acid comprising the paternal allele is relatively enriched.
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Citations
18 Claims
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1. A method for detecting in nucleic acid from a sample the presence or absence of an allele of paternal origin, comprising:
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a) cleaving nucleic acid from the sample with a Tsp509I restriction enzyme; b) exposing the nucleic acid after (a) to amplification conditions that amplify uncleaved nucleic acid but not cleaved nucleic acid, and which amplification conditions are capable of generating amplification products comprising some or all of the single nucleotide polymorphic loci selected from the group consisting of; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification