A protease purified from the fresh leaves of Acer truncatum Bunge by means of Sephadex A-50, Sephadex G-200 column chromatography.

• 采用Sephadex A-50；Sephadex G-200柱层析的方法；从槭树科槭树属元宝枫(AcertruncatumBunge)的叶片中提取并纯化了叶蛋白酶.