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对比两种分析微卫星多态性的电泳方法 被引量:2

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摘要 目的 对比变性聚丙烯酰胺凝胶电泳和 Spreadex凝胶电泳两种方法分析微卫星多态性。方法 取 1 1 8例冠心病患者的外周血 ,以高盐沉淀法提取基因组 DNA,经 PCR扩增 HO- 1基因启动子微卫星序列后 ,分别采用变性聚丙烯酰胺凝胶电泳和 Spreadex凝胶电泳两种方法进行基因型分析 ,并选择部分样本以 Sanger末端终止法测定 DNA序列。结果 长度相差 8bp的两条 DNA marker在变性聚丙烯酰胺凝胶上相隔 1 mm;而在 Spreadex凝胶上相隔 8mm,图像清晰且条带分明。同一批样本分别采用两种方法电泳 ,1 1 8个样本中 1 1 0个结果一致 ,两种电泳方法一致性为 93%;对电泳结果不一致的样本重新进行电泳 ,均为变性聚丙烯酰胺电泳结果改变而 Spreadex凝胶电泳结果不变 ,最后两种电泳方法一致性达1 0 0 %。Spreadex凝胶电泳结果与测序结果完全符合。结论 与变性聚丙烯酰胺凝胶电泳相比 ,Spreadex凝胶电泳分辨率较高 ,重复性较好 ,更适用于分析微卫星多态性。
出处 《中华医学遗传学杂志》 CAS CSCD 2004年第5期526-527,共2页 Chinese Journal of Medical Genetics
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同被引文献24

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