pcr amplification短语¹⁴⁴⁹⁷²⁺² 基本例句 聚合酶链式反应扩增,PCR扩增 Methods: Specific PCR amplification was used to screen human PSP94 recombinant plasmid, with incubating medium as template directly. 方法：直接以菌液为模板，采用两条特异性引物，利用 PCR筛选人前列腺分泌蛋白94 PSP94的阳性重组质粒。 cnki Objective To study the fetal DNA in maternal plasma using multiplex PCR amplification of the short tandem repent STR systems. 目的采用短串联重复序列 STR多态位点的复合扩增方法，研究孕妇血浆中胎儿 DNA基因型。 cnki