Detection of single nucleotide polymorphisms
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United States of America Patent
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Issued Date -
Dec 5, 2002
app pub date -
Jun 4, 2001
filing date -
Jun 4, 2001
priority date (Note) -
Abandoned
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Abstract
A method determining the presence or absence of a single nucleotide polymorphism at a SNP site in a nucleic acid target. Capture probes are designed, each of which has a different SNP base and a sequence of probe bases on each side of the SNP base. The probe bases are complementary to the corresponding target sequence adjacent to the SNP site. Each capture probe is immobilized on a different electrode having a non-conductive outer layer on a conductive working surface of a substrate. The extent of hybridization between each capture probe and the nucleic acid target is detected by detecting the oxidation-reduction reaction at each electrode, utilizing a transition metal complex. These differences in the oxidation rates at the different electrodes are used to determine whether the selected nucleic acid target has a single nucleotide polymorphism at the selected SNP site.
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