Any of the chemically distinct forms of an enzyme that perform the same biochemical function.
同工酶，同功酶具有相同的生化功能的一种酶的不同化学形式中的任一种
A substance, especially an enzyme, that initiates or modifies the rate of a chemical reaction in a living body; a biochemical catalyst.
生物催化剂能在活的体内产生化学反应或改变生物体内化学反应速度的物质，尤指酶；生物化学催化剂
An enzyme that promotes the passage of a substance across a cell membrane.
透性酶激活另一种物质穿透细胞膜的一种酶
