摘要：

本研究尝试将触减 PCR与3’ cDNA末端快速扩增（rapid amplification of cDNA ends，RACE）技术进行结合，仅用一条特异性引物和一条通用引物，成功地实现了从3’末端cDNA库对鸡含锰超氧化物歧化酶（manganese-containing superoxide dismutase，MnSOD）全长cDNA的一步3’RACE快速构建。与常规使用的末端PCR或亚克隆方法相比，该法具有快速、省时、经济和特异性好的优点。Abstract: RACE(rapid amplification of cDNA ends) is a popular technique to rapidly obtain the full-length cDNA. After obtaining the 3’cDNA and 5’cDNA fragments with a overlapped region by 3’RACE and 5’RACE, the full-length cDNA could be generated by end-to-end PCR or subcloning. In this study, 3’RACE combined with touch-down PCR was successfully used for the rapid construction of full-length MnSOD cDNA of chickens. Compared with the conventional end-to-end PCR or subcloning, this method, called one-step 3’RACE, is fast, economical and highly specific. It especially fits the rapid construction of full-length cDNA by RACE method.