Single Strand Conformation Polymorphism Analysis of Ras Oncogene by Capillary Electrophoresis with Laser-Induced Fluorescence Detector.

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Single strand conformation polymorphism (SSCP) analysis of the N-ras oncogene was achieved by capollary electrophoresis with a laser-induced fluorescence detector (CE-LIF) using methylcellulose as a molecular sieving agent. The PCR-amplified N-ras oncogene, which is known to have a point mutation at codon 61 in the neuroblastome, was investigated by CE-LIF combined with SSCP (SSCP-CE-LIF). A mixture of wild- and mutant-type single strand DNA fragments (103 bp) of the N-ras oncogene was separated by buffer solution containing 1.0% methylcellulose and 0.2μm fluorescent dye (YO-PRO-1) at 25°C.The SSCP-CE-LIF technique gave good resolution for wild- and mutant-type single strand DNA fragments with separation completed within 7 min. SSCP analysis using a CE system with a LIF detector was successfully applied to the detection of the one point mutation on the N-ras oncogene.

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