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Multiplexed systems for nucleic acid sequencing

  • US 7,291,460 B2
  • Filed: 05/30/2003
  • Issued: 11/06/2007
  • Est. Priority Date: 05/31/2002
  • Status: Expired due to Fees
First Claim
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1. A method for determining the sequence of a polynucleotide comprising,a) providing at least one population of polynucleotides wherein members of the population share a nucleotide sequence;

  • b) providing 4x sets of sequencing adaptors, wherein each set of sequencing adaptors comprises one of 4x possible combinations of nucleotides in a single-stranded region of x nucleotides long, a nuclease recognition site for a nuclease that produces a single-stranded region of x nucleotides long, and a detectable optical marker that is unique to that set of sequencing adaptors, where x is an integer of 3 or more;

    c) attaching a first end of said polynucleotides to a substrate and ligating to a second end of said polynucleotides a set of initial adaptors comprising a recognition site for a nuclease;

    d) treating said polynucleotides with a nuclease specific for the recognition site of the initial adaptors, wherein said nuclease cleaves the polynucleotides but not the recognition site to produce digested polynucleotides comprising a single-stranded region of x nucleotides;

    e) simultaneously contacting the digested polynucleotides with the 4x sets of sequencing adaptors under conditions such that the sequencing adaptors hybridize to the digested polynucleotides with minimal mismatches;

    f) ligating the hybridized sequencing adaptors to the polynucleotides to produce adaptor-ligated polynucleotides;

    g) removing unhybridized sequencing adaptors;

    h) determining the identity of the hybridized sequencing adaptors by their unique marker thus simultaneously determining the identity and order of x nucleotides in said polynucleotides;

    i) treating the adaptor-ligated polynucleotides with a nuclease specific for the recognition site of the sequencing adaptors, wherein said nuclease cleaves the polynucleotides but not the recognition site to produce digested polynucleotides comprising a single-stranded region of x nucleotides and a sequencing adaptor fragment; and

    j) repeating e) through i) at least once, or until the sequence of the polynucleotide has been determined wherein said optical markers are selected using the formula;

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