1. Oxidoreductases

   1.1  Acting on the CH-OH group of donors

   1.2  Acting on the aldehyde or oxo group of donors

   1.3  Acting on the CH-CH group of donors

   1.4  Acting on the CH-NH2 group of donors

   1.5  Acting on the CH-NH group of donors

   1.6  Acting on NADH or NADPH

   1.7  Acting on other nitrogenous compounds as donors

   1.8  Acting on a sulfur group of donors

   1.9  Acting on a heme group of donors

   1.10  Acting on diphenols and related substances as donors

   1.11  Acting on a peroxide as acceptor

   1.12  Acting on hydrogen as donor

   1.13  Acting on single donors with incorporation of molecular oxygen (oxygenases)

   1.14  Acting on paired donors, with incorporation or reduction of molecular oxygen

     1.14.11  With 2-oxoglutarate as one donor, and incorporation of one atom of oxygen into each donor

     1.14.12  With NADH or NADPH as one donor, and incorporation of two atoms of oxygen into the other donor

       1.14.12.1  anthranilate 1,2-dioxygenase (deaminating, decarboxylating)

       1.14.12.3  benzene 1,2-dioxygenase

       1.14.12.7  phthalate 4,5-dioxygenase

       1.14.12.8  4-sulfobenzoate 3,4-dioxygenase

       1.14.12.9  4-chlorophenylacetate 3,4-dioxygenase

       1.14.12.10  benzoate 1,2-dioxygenase

       1.14.12.11  toluene dioxygenase

       1.14.12.12  naphthalene 1,2-dioxygenase

       1.14.12.13  2-halobenzoate 1,2-dioxygenase

       1.14.12.14  2-aminobenzenesulfonate 2,3-dioxygenase

       1.14.12.15  terephthalate 1,2-dioxygenase

       1.14.12.16  2-hydroxyquinoline 5,6-dioxygenase

       1.14.12.17  nitric oxide dioxygenase

       1.14.12.18  biphenyl 2,3-dioxygenase

       1.14.12.19  3-phenylpropanoate dioxygenase

       1.14.12.22  carbazole 1,9a-dioxygenase

       1.14.12.23  nitroarene dioxygenase

       1.14.12.24  2,4-dinitrotoluene dioxygenase

       1.14.12.25  p-cumate 2,3-dioxygenase

       1.14.12.26  chlorobenzene dioxygenase

     1.14.13  With NADH or NADPH as one donor, and incorporation of one atom of oxygen into the other donor

     1.14.14  With reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen into the other donor

     1.14.15  With reduced iron-sulfur protein as one donor, and incorporation of one atom of oxygen into the other donor

     1.14.16  With reduced pteridine as one donor, and incorporation of one atom of oxygen into the other donor

     1.14.17  With reduced ascorbate as one donor, and incorporation of one atom of oxygen into the other donor

     1.14.18  With another compound as one donor, and incorporation of one atom of oxygen into the other donor

     1.14.19  With oxidation of a pair of donors resulting in the reduction of O2 to two molecules of water

     1.14.20  With 2-oxoglutarate as one donor, and the other dehydrogenated

     1.14.99  Miscellaneous

   1.15  Acting on superoxide as acceptor

   1.16  Oxidizing metal ions

   1.17  Acting on CH or CH2 groups

   1.18  Acting on iron-sulfur proteins as donors

   1.19  Acting on reduced flavodoxin as donor

   1.20  Acting on phosphorus or arsenic in donors

   1.21  Catalysing the reaction X-H + Y-H = X-Y

   1.23  Reducing C-O-C group as acceptor

   1.97  Other oxidoreductases

 2. Transferases

 3. Hydrolases

 4. Lyases

 5. Isomerases

 6. Ligases

 7. Translocases