Enzymes are categorized based on the types of reactions they catalyze:
Oxidoreductases - catalyze oxidation-reduction reactions. Transferases - transfer functional groups between molecules. Hydrolases - catalyze the hydrolysis of various bonds. Lyases - break bonds by means other than hydrolysis and oxidation. Isomerases - facilitate the rearrangement of atoms within a molecule. Ligases - join two molecules together using ATP.
