Achyranthes bidentata 40%-5 component has high specific activity(297.72 U/mg), molecular weight is about 24KD, and it is a monomer, PAGE and SDS-PAGE showed same single band, has high value for further study.

• 其中分离到的牛膝40%25-5蛋白组分，具有比较高的比活力(297.；72 U/mg)，且分子量较小(约24KD)，又以单体形式发挥作用，PAGE和SDS-PAGE均为单一条带，具有进一步进行分子操作和药理实验的价值。