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RT -PCR即逆转录-聚合酶链反应。原理是：提取组织或细胞中的总RNA，以其中的mRNA作为模板，采用Oligo（dT）或随机引物利用逆转录酶反转录成cDNA。再以cDNA为模板进行PCR扩增，而获得目的基因或检测基因表达。RT-PCR使