目前对于基因序列的突变分析国内外多采用直接测序方法,直观又准确。例如,1996年Sakai等报道了对高α脂蛋白血症患者CETP基因内含子10和内含子14片段序列的突变分析。其方法为:采取患者全血根据Kunkel等方法准备基因DNA;CETP基因内含子10的splice donor位点的PCR扩增引物为:5'-CCCTGCGAATTCTTCTTCTGAGGAGTGGAC-3’和5'-ATAATTGCATCCATTGGTGGTGTTSTTGGC-3’,内含子14的splice donor位点的PCR扩增引物为:5’-CTTCTGTGCTCCAGGGAGGACTCACCATGG-3’和5’-GGCACCCAGTTTCCCCTCCAGCCCACACAT-3’其中分别含有用于克隆的EcorI和BamHI酶切后,亚克隆人Bluescriptll KS(一)中;最后根据Sanger双脱氧核苷酸终点法测定DNA序列。
(章晓联)
参考文献
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