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调查了 １００例中国藏族人的 Ｂ因子（Ｂｆ）多态性，共检出 ５个表现型（Ｓ，ＳＦ，Ｆ，Ｓ０７，ＦＳ０７）。与汉族人比较，未发现显著差别。而有资料报道，三大人种之间的Ｂｆ多态性有显著差异。
The polymorphisms of the B factor (Bf) in 100 Chinese Tibetans were investigated and a total of five phenotypes (S, SF, F, S07, and FS07) were detected. Compared with Han Chinese, no significant difference was found. However, there are data reported that there are significant differences in the Bf polymorphism among the three major races.