Enzymes [Chemical/Ingredient] N0000008262 Biological molecules that possess catalytic activity. They may occur naturally or be synthetically created. Enzymes are usually proteins, however CATALYTIC RNA and CATALYTIC DNA molecules have also been identified. M0007528 Biocatalysts 3960 Enzymes D004798 C0014442 Enzymes Enzymes and Coenzymes [Chemical/Ingredient]