Enzymes

Hydrolase

hydrolyzes chemical bonds (includes ATPases, proteases, and others)

Isomerase

rearranges bonds within a molecule to form an isomer

Ligase

forms a chemical bond (e.g., DNA ligase)

Lyase

breaks chemical bond by means other than oxidation or hydrolysis (pyruvate decarboxylase)

Kinase

transfers a phosphate group to a molecule from a high energy carrier, such as ATP

Oxidoreductases

runs redox reactions (includes oxidases, reductases, dehydrogenases, and others)

Polymerase

polymerization (e.g., addition of nucleotides to the leading strand of DNA by DNA polymerase III)

Phosphatase

removes a phosphate group from a molecule

Phosphorylase

transfers a phosphate group to a molecule from inorganic phosphate (e.g., glycogen phosphorylase)

Protease

hydrolyzes peptide bonds (e.g., trypsin, chymotrypsin, pepsin, etc.)