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Bio-barcodes based on oligonucleotide-modified nanoparticles

  • US 20020192687A1
  • Filed: 03/27/2002
  • Published: 12/19/2002
  • Est. Priority Date: 03/28/2000
  • Status: Active Grant
First Claim
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1. A method for detecting for the presence of a target analyte in a sample comprising:

  • providing a particle complex probe comprising a particle having oligonucleotides bound thereto, a DNA barcode, and a oligonucleotide having bound thereto a specific binding complement to a target analyte, wherein the DNA barcode has a sequence having at least two portions, at least some of the oligonucleotides attached to the particle have a sequence that is complementary to a first portion of a DNA barcode, the oligonucleotides having bound thereto a specific binding complement have a sequence that is complementary to a second portion of a DNA barcode, and wherein the DNA barcode is hybridized at least to some of the oligonucleotides attached to the particle and to the oligonucleotides having bound thereto the specific binding complement;

    contacting the sample with a particle complex probe under conditions effective to allow specific binding interactions between the analyte and the particle complex probe and to form an aggregated complex in the presence of analyte; and

    observing whether aggregate formation occurred.

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