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STR系统是人类基因组中具有高度多态性的遗传标志系统，其DNA片段通常小于500hp，很容易通过PCR扩增并进行检测＼笔者参照美国Promega公司的HUMCSFIPO－HUMTPOOHUMTHVCTT）三位点复合扩增的方法，在对中国上海地区117例个体作了人群频率调查以后，逐步将该方法运用于血液。血痕
STR system is a highly polymorphic genetic marker system in human genome. Its DNA fragment is usually less than 500hp and can be easily amplified by PCR and detected by the author. The author refers to the three-site multiplex amplification of HUMCSFIPO-HUMTPOOHUMTHVCTT by Promega Corporation in the United States Method, 117 individuals in Shanghai, China conducted a population frequency survey, and gradually apply the method to the blood. Blood stains