Methods: A cDNA fragment from the mRNAs of skeletal muscle of 13 day old chicken embryo was amplified by RT PCR method, and inserted into pGEM and pUC vectors at clone sites and sequenced respectively.

• 方法 :从 13d鸡胚骨骼肌mRNAs经RT PCR方法扩增RTEF 1的编码序列 (cDNA) ,将其克隆到 pGEM和 pUC载体并进行核苷酸序列分析。