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Method for the electronic analysis of a sample oligonucleotide sequence

  • US 8,389,212 B1
  • Filed: 07/22/1999
  • Issued: 03/05/2013
  • Est. Priority Date: 11/01/1993
  • Status: Expired due to Fees
First Claim
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1. A method for analyzing a sample oligonucleotide sequence in solution comprising:

  • (a) forming a plurality of individually electronically addressable microscopic locations on a substrate, each microscopic location comprising a micro-electrode;

    (b) providing a permeation layer adjacent to said micro-electrode in each of said microscopic locations, said permeation layer having selective diffusion properties thereby permitting the free transport of counter-ions to said micro-electrode and inhibiting large binding entities from physical contact with said micro-electrode;

    (c) providing an attachment layer adjacent to said permeation layer in each of said microscopic locations;

    (d) electronically immobilizing one or more anchor sequences to said attachment layer in individually selected microscopic locations, wherein said one or more anchor sequences comprise oligonucleotide sequences capable of hybridizing with said sample oligonucleotide sequence;

    (e) contacting said sample oligonucleotide sequence with said one or more anchor sequences thereby allowing said sample oligonucleotide sequence to hybridize to said one or more anchor;

    (f) subjecting said individually selected microlocations to a continuous and constant electric field which moves unhybridized and partially hybridized sample oligonucleotide sequences away from said one or more anchor;

    (g) determining whether said sample oligonucleotide sequence is hybridized to said one or more anchor sequences; and

    controlling a level of stringency of hybridization, by adjusting a power level of said electric field and/or a length of time said individually selected microlocations are subjected to said electric field in step (f), to improve said analyzing of the sample oligonucleotide sequence, by enabling ensuring removal of partially hybridized sequences and improving the resolution of single mis-match hybridizations.

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