Human CPP32 gene was ligated into vector pEV321 and pEX31B,respectively. The resulting recombinant plasmids were designated pBV321/CPP and pEX31B/CPP.

• 将人源CPP32基因分别克隆到载体pBV321和pEX31B中，得到pBV321/CPP和pEX31B/CPP两种重组质粒。