The fusion protein level,renaturation of inclusion bodies,purity of aprotinin,total recovery and the activity were about 45%,70%,90%,32% and 3.1 EPU/mg respectively.

• 融合蛋白的表达量为45%25；包涵体复性率为70%25以上；抑肽酶纯度为90%25；总收率为32%25；比活力为3.；1 EPU/mg。