Stabilizer of dye sequencing products
First Claim
1. A method of reducing degradation of fluorescent dye-labeled polymerase extension products, comprising adding to the extension products formamide and at least one additional compound selected from the group consisting of a base, a buffer and a reducing agent, wherein the additional compound is not alkaline ethylenediaminetetraacetic acid (EDTA), and wherein less degradation of polymerase extension products occurs in the presence of formamide and the additional compound a in the presence of formamide without the additional compound.
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Abstract
Methods for reducing degradation of polymerase extension products in the presence of formamide, where the polymerase extension products comprise a nonradioactive detection moiety, are disclosed. The methods comprise adding a base, a buffer or a reducing agent to the polymerase extension products. Sequencing methods which generate polymerase extension products comprising a nonradioactive detection moiety are also disclosed, wherein the degradation of the extension products is reduced or eliminated by the addition of a base, a buffer, or a reducing agent. Compositions for reducing degradation of the above polymerase extension products are also disclosed, where the compositions comprise a base, a buffer, or a reducing agent. Kits for performing sequencing methods are also disclosed, wherein the degradation of polymerase extension products is reduced or eliminated. The kits comprise a base, a buffer, or a reducing agent, and instructions.
28 Citations
21 Claims
- 1. A method of reducing degradation of fluorescent dye-labeled polymerase extension products, comprising adding to the extension products formamide and at least one additional compound selected from the group consisting of a base, a buffer and a reducing agent, wherein the additional compound is not alkaline ethylenediaminetetraacetic acid (EDTA), and wherein less degradation of polymerase extension products occurs in the presence of formamide and the additional compound a in the presence of formamide without the additional compound.
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10. A method for determining the sequence of a DNA template which comprises
(a) preparing a sequencing reaction mixture comprising (i) the DNA template; -
(ii) a primer which is a complementary to a 3′
region of the DNA template;
(iii) unlabeled deoxyribonucleoside triphosphates;
(iv) at least one dideoxyribonucleoside triphosphate;
(v) a DNA polymerase;
(vi) a substance labeled with a fluorescent dye, wherein the substance is a deoxyribonucleoside triphosphate, the primer, or the at least one dideoxyribonucleoside triphosphate; and
(vii) an aqueous buffer (b) treating the sequencing reaction mixture under conditions and for a time sufficient to synthesize a series of polymerase extension products of different lengths, wherein each of the polymerase extension products comprises a sequence of nucleotides complementary to at least part of the DNA template and wherein at least one of the nucleotides in each extension product comprises the fluorescent dye;
(c) mixing the polymerase extension products with a denaturing solution comprising formamide, wherein the denaturing solution further comprises at least one compound that reduces degradation of the nucleotide comprising the fluorescent dye, wherein the at least one compound is not alkaline ethylenediaminetetraacetic acid (EDTA); and
(d) analyzing the denatured polymerase extension products to determine the sequence of nucleotides in the DNA template. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 21)
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Specification