ras癌基因点突变的研究

A study on point mutation of ras oncogenes

N-ras基因第12密码子、K-ras基因第12和13位密码子无已知的限制性内切酶的酶切位点,不能使用PCR-RFLP方法分析这些位点的突变。我们在PCR引物的3’端引入了一个误配的硷基使之正好成为某限制性内切酶的酶切位点,因而能使用PCR-RFLP方法分析上述位点的突变。本文使用PCR-RFLP方法分析了c-Ha-ras基因第12和61位、N-ras基因第12位、K-ras基因第12位和13位密码子的点突变。

It is known that no restriction endonuclease cleavage site exists at 12 codon in N-ras gene and at 12 and 13 codon in K-ras gene.Amismatched base was incorporated at the 3' end primer to creat a kind of restriction endonuclease cleavage site.Then it was possible for us to analyze the point mutation of the above mentioned codons with the polymerase chain reaction-restriction fragment length polymorphism.In this paper,the study of the point mutation at 12 and 61 codon in c-Ha-ras,at 12 codon in N-ras,and at 12 and 13 codon in K-ras was reported.