STUDY ON BclI/St14 RFLPs IN CHINESE FOR DNA DIAGNOSIS FOR HEMOPHILIA A

The BclI polymorphism within DXS52 (St14) was reported. It was composed of 4 allelic fragments 4.0 kb, 3.3 kb, 3.0 kb and 2.3 kb, The frequency of these fragments were 0.09, 0.12, 0.44 and 0.35 respectively in the Chinese. The polymorphism provided the PIC of 0.66. DNA analysis of families, with hemophilia A showed that the confidence of the RFLPs was the same as the TaqI/St14 RFLPs and for carrier detection the former is much better than that of the TaqI/St14 RFLPs.     

变性无胶毛细管筛分电泳分析聚合酶链式反应产物

在分离Ｙ染色体性别决定区,人１１号染色体短β－珠蛋白基因部分序列扩增产物和ＰＢＲ３２２／ＨａｅⅢ标准片段的混合样品时,ＳＲＹ和１０８／Ｂ的迁移时间均产生较大的偏差,在尿素变性存在的无胶筛分体系中迁移时,这种迁移时间的偏差得以消除,这意味着尿素性剂的存在消除了ＤＮＡ空间结构对迁移的影响,ＤＮＡ在此筛分介质中的迁移只与其片段长度有关。