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Methods and solutions for inhibiting undesired cleaving of labels

  • US 9,605,301 B2
  • Filed: 08/11/2014
  • Issued: 03/28/2017
  • Est. Priority Date: 03/19/2008
  • Status: Active Grant
First Claim
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1. A method of incorporating labeled nucleotides into nucleic acid, comprising:

  • a) providing i) a reaction chamber comprising plurality of nucleic acid template molecules bound to a solid support, ii) a first solution comprising polymerase and a plurality of nucleotide analogues selected from the group consisting of dCTP, dTTP, dUTP, dATP and dGTP, wherein each nucleotide analogue comprises a unique label attached through a cleavable linker, and wherein each nucleotide analogue contains a removable chemical moiety capping the 3′

    -OH group, iii) a second solution comprising a cleaving agent, and iv) a cleaving agent scavenger;

    b) introducing said first solution into said reaction chamber under conditions wherein a first nucleotide analogue is incorporated by said polymerase;

    c) detecting the label of the incorporated nucleotide analogue;

    d) introducing said second solution into said reaction chamber under conditions such that the chemical moiety of the incorporated nucleotide analogue capping the 3′

    -OH group is removed and said cleavable linker is cleaved by said cleaving agent; and

    e) introducing said cleaving agent scavenger into said reaction chamber under conditions so as to scavenge said cleaving agent.

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