×

Polymorphism detection and separation

  • US 7,468,244 B2
  • Filed: 09/27/2002
  • Issued: 12/23/2008
  • Est. Priority Date: 09/27/2001
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of distinguishing the presence of a nonsupercoiled target nucleic acid from the presence of nonsupercoiled target variants within a sample of nucleic acids having a common target query region, the method comprising:

  • providing a first oligonucleotide and a second oligonucleotide, wherein said first oligonucleotides is bound by a recombinase and said second oligonucleotide is free of a recombinase;

    adding said first oligonucleotide to the sample to form a mixture;

    adding said second oligonucleotide to the mixture to form a double D loop;

    deproteinizing the double D loop; and

    distinguishing the double D loops that are stable to deproteinization, wherein the presence of a stable double D loop distinguishes the presence of target from that of variants;

    wherein the first oligonucleotide comprises a complementarity region that is perfectly complementary to a first strand of the target across the entirety of the target query region and wherein the second oligonucleotide includes a complementarity region that is perfectly complementary in sequence to a second strand of the target across at least a portion of the target query region, and at least one of said first or second oligonucleotide complementarity regions is imperfectly complementary to at least one of a first strand or a second strand of the query region of the target variants.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×