classification of enzymes

biochem exam 1

oxidoreductases

transfer of electrons (hydride ions or H atoms)

transferases

group transfer reactions

hydrolases

hydrolysis reactions (transfer of functional groups to water)

lyases

addition of groups to double bonds, or formation of double bonds by removal of groups

isomerases

transfer of groups within molecules to yield isomeric forms

ligases

formation of C-C, C-S, C-O, and C-N bonds by condensation reactions coupled to cleavage of ATP or similar cofactor