Differentiation of nucleic acid segments on the basis of nucleotide differences
First Claim
1. A process for distinguishing nucleic acid segments on the basis of nucleotide differences, which comprisessynthesizing separately complementary nucleic acid strands on each of at least two target nucleic acid templates using a nucleic acid polymerase and nucleoside triphosphate substrates, wherein at least one of the natural nucleoside triphosphate substrates is completely replaced with a mobility-shifting analog;
- and comparing the mobility of the separately synthesized strands in single-stranded form through a size-fractionation medium.
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Abstract
A process for distinguishing nucleic acid segments on the basis of nucleotide differences, thereby providing a rapid, convenient means for detecting mutation, is disclosed. The present process comprises synthesizing separately complementary nucleic acid strands on each of at least two target nucleic acid templates using a nucleic acid polymerase and nucleoside triphosphate substrates, wherein at least one of the natural nucleoside triphosphate substrates is replaced with a mobility-shifting analog; denaturing the synthesized strands from the templates if necessary; and comparing the mobility of the separately synthesized strands through a size-fractionation medium. A difference in mobility indicates that the target nucleic acid templates contain different numbers of total nucleotides and/or different numbers of nucleotides complementary to the mobility-shifting analogs. Thus, the process of the present invention can be used to distinguish homologous DNAs or RNAs differing by nucleotide substitutions that affect the number of mobility-shifting analog residues incorporated into synthesized strands, as well as to distinguish differences due to nucleotide insertion or deletion.
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10 Claims
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1. A process for distinguishing nucleic acid segments on the basis of nucleotide differences, which comprises
synthesizing separately complementary nucleic acid strands on each of at least two target nucleic acid templates using a nucleic acid polymerase and nucleoside triphosphate substrates, wherein at least one of the natural nucleoside triphosphate substrates is completely replaced with a mobility-shifting analog; and comparing the mobility of the separately synthesized strands in single-stranded form through a size-fractionation medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
Specification