Design of Base-Discriminating Fluorescent Nucleoside and Its Application to T/C SNP Typing

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Abstract

We report a novel method for base detection using a base-discriminating fluorescent (BDF) nucleoside. We developed BDF probes containing methoxybenzodeazaadenine MDA and methoxybenzodeazainosine MDI, which give strong fluorescence only when the base on the complementary strand is cytosine and thymine, respectively. Thus, the MDA- and MDI-containing ODNs can be used as a very effective BDF probe for the detection of single base alterations, such as SNPs and point mutations. The present method using BDF probes is a very powerful tool for SNP typing that does not require any enzymes and time-consuming steps, and can avoid hybridization errors. In addition, a combination of MDA- and MDI-containing BDF probes facilitates the T/C SNP typing of a heterozygous sample.

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