It showed 78.08% radio immuno activity (RIA), but only about 5.2% of receptor binding activity (RBA) as compared with Met-human proinsulin (Met-HPI) which was prepared in the same way.

• 以同样方法获得的Met-人胰岛素原(Met-HPI)为对照，研究了其理化性质和生物活性的变化，结果表明，Mut-HPI保留了大部分放射免疫活性，而受体结合活性却只有Met-HPI的5.；2%25。