Agarose electrophoresis showed that the dou-ble-strand cDNA fragments ranged from 100 bp to 6500 bp, most of them were longerthan 500 bp.

• 琼脂糖凝胶电泳显示；所合成的cDNA分子量范围由100到6500bP；且绝大部分大于500bP.