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Methods for determination of single nucleic acid polymorphisms using a bioelectronic microchip

  • US 20030073122A1
  • Filed: 09/16/2002
  • Published: 04/17/2003
  • Est. Priority Date: 11/01/1993
  • Status: Active Grant
First Claim
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1. A method for determining single nucleic acid polymorphisms in target nucleic acids of interest using base-stacking energies and an electronically addressable microchip comprising:

  • a. providing target nucleic acids of interest that are or are not subjected to an amplification reaction using either at least one amplification primer for linear amplification or at least one pair of amplification primers for exponential amplification to form amplification products of said targets;

    b. electronically addressing said target nucleic acids or said amplification products to at least one capture site on said microchip while in the presence of first sets of “

    stabilizer”

    oligonucleotides that are complementary to at least one nucleic acid strand of said target nucleic acids or said amplification products, said stabilizer oligonucleotides and the target or amplification product strand to which said stabilizer oligonucleotides are complementary further forming hybridized complexes;

    c. capturing said hybridized complexes to said capture site;

    d. hybridizing to said complexes second sets of “

    reporter”

    oligonucleotides which are complementary to the same strand of said target nucleic acids or amplification product to which said stabilizer is complementary to form ternary structures, said reporter oligonucleotides further hybridizing to said complex such that said stabilizer and said reporter oligonucleotides are annealed to said target nucleic acids or amplification products at positions adjacent to one another;

    c. subjecting said ternary structures to destabilizing conditions sufficient to cause said reporters to dissociate from said ternary structures if there is at least one base-pair mismatch between said reporters and said target nucleic acids or amplification products, and f detecting a loss or a retention of said reporters from said capture site.

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