酶是大分子生物催化剂。酶促进化学反应。酶作用于其上的分子称为底物，酶将底物转化成不同的分子称为产物。
Ficin from Fig Tree Latex
S-(2-(3-((2R)-4-(((((((2R,3S,4R,5R)-5-(6-Amino-9H-purin-9-yl)-4-hydroxy-3-(phosphonooxy)tetrahydrofuran-2-yl)methoxy)(hydroxy)phosphoryl)oxy)(hydroxy)phosphoryl)oxy)-2-hydroxy-3,3-dimethylbutanamido)propanamido)ethyl) ethanethioate, lithium salt (1:x)
Cholesterol esterase
Superoxide dismutase
Diastase
Acetylcholinesterase
Xylanase
Urate oxidase
Proteinase
Phospholipase A2
β-Glucosidase
Endo-β-1,4-mannanase
Naringinase
