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)

     1.13.11  With incorporation of two atoms of oxygen

       1.13.11.1  catechol 1,2-dioxygenase

       1.13.11.2  catechol 2,3-dioxygenase

       1.13.11.3  protocatechuate 3,4-dioxygenase

       1.13.11.4  gentisate 1,2-dioxygenase

       1.13.11.5  homogentisate 1,2-dioxygenase

       1.13.11.6  3-hydroxyanthranilate 3,4-dioxygenase

       1.13.11.8  protocatechuate 4,5-dioxygenase

       1.13.11.9  2,5-dihydroxypyridine 5,6-dioxygenase

       1.13.11.10  7,8-dihydroxykynurenate 8,8a-dioxygenase

       1.13.11.11  tryptophan 2,3-dioxygenase

       1.13.11.12  linoleate 13S-lipoxygenase

       1.13.11.14  2,3-dihydroxybenzoate 3,4-dioxygenase

       1.13.11.15  3,4-dihydroxyphenylacetate 2,3-dioxygenase

       1.13.11.16  3-carboxyethylcatechol 2,3-dioxygenase

       1.13.11.17  indole 2,3-dioxygenase

       1.13.11.18  persulfide dioxygenase

       1.13.11.19  cysteamine dioxygenase

       1.13.11.20  cysteine dioxygenase

       1.13.11.22  caffeate 3,4-dioxygenase

       1.13.11.23  2,3-dihydroxyindole 2,3-dioxygenase

       1.13.11.24  quercetin 2,3-dioxygenase

       1.13.11.25  3,4-dihydroxy-9,10-secoandrosta-1,3,5(10)-triene-9,17-dione 4,5-dioxygenase

       1.13.11.26  peptide-tryptophan 2,3-dioxygenase

       1.13.11.27  4-hydroxyphenylpyruvate dioxygenase

       1.13.11.28  2,3-dihydroxybenzoate 2,3-dioxygenase

       1.13.11.29  stizolobate synthase

       1.13.11.30  stizolobinate synthase

       1.13.11.31  arachidonate 12-lipoxygenase

       1.13.11.33  arachidonate 15-lipoxygenase

       1.13.11.34  arachidonate 5-lipoxygenase

       1.13.11.35  pyrogallol 1,2-oxygenase

       1.13.11.36  chloridazon-catechol dioxygenase

       1.13.11.37  hydroxyquinol 1,2-dioxygenase

       1.13.11.38  1-hydroxy-2-naphthoate 1,2-dioxygenase

       1.13.11.39  biphenyl-2,3-diol 1,2-dioxygenase

       1.13.11.40  arachidonate 8-lipoxygenase

       1.13.11.41  2,4'-dihydroxyacetophenone dioxygenase

       1.13.11.43  lignostilbene alphabeta-dioxygenase

       1.13.11.45  linoleate 11-lipoxygenase

       1.13.11.46  4-hydroxymandelate synthase

       1.13.11.47  3-hydroxy-4-oxoquinoline 2,4-dioxygenase

       1.13.11.48  3-hydroxy-2-methylquinolin-4-one 2,4-dioxygenase

       1.13.11.49  chlorite O2-lyase

       1.13.11.50  acetylacetone-cleaving enzyme

       1.13.11.51  9-cis-epoxycarotenoid dioxygenase

       1.13.11.52  indoleamine 2,3-dioxygenase

       1.13.11.53  acireductone dioxygenase (Ni2+-requiring)

       1.13.11.54  acireductone dioxygenase [iron(II)-requiring]

       1.13.11.55  sulfur oxygenase/reductase

       1.13.11.56  1,2-dihydroxynaphthalene dioxygenase

       1.13.11.57  gallate dioxygenase

       1.13.11.58  linoleate 9S-lipoxygenase

       1.13.11.59  torulene dioxygenase

       1.13.11.60  linoleate 8R-lipoxygenase

       1.13.11.61  linolenate 9R-lipoxygenase

       1.13.11.62  linoleate 10R-lipoxygenase

       1.13.11.63  beta-carotene 15,15'-dioxygenase

       1.13.11.64  5-nitrosalicylate dioxygenase

       1.13.11.65  carotenoid isomerooxygenase

       1.13.11.66  hydroquinone 1,2-dioxygenase

       1.13.11.67  8'-apo-beta-carotenoid 14',13'-cleaving dioxygenase

       1.13.11.68  9-cis-beta-carotene 9',10'-cleaving dioxygenase

       1.13.11.69  carlactone synthase

       1.13.11.70  all-trans-10'-apo-beta-carotenal 13,14-cleaving dioxygenase

       1.13.11.71  carotenoid-9',10'-cleaving dioxygenase

       1.13.11.72  2-hydroxyethylphosphonate dioxygenase

       1.13.11.73  methylphosphonate synthase

       1.13.11.74  2-aminophenol 1,6-dioxygenase

       1.13.11.75  all-trans-8'-apo-beta-carotenal 15,15'-oxygenase

       1.13.11.76  2-amino-5-chlorophenol 1,6-dioxygenase

       1.13.11.77  oleate 10S-lipoxygenase

       1.13.11.78  2-amino-1-hydroxyethylphosphonate dioxygenase (glycine-forming)

       1.13.11.79  aerobic 5,6-dimethylbenzimidazole synthase

       1.13.11.80  (3,5-dihydroxyphenyl)acetyl-CoA 1,2-dioxygenase

       1.13.11.81  7,8-dihydroneopterin oxygenase

       1.13.11.82  8'-apo-carotenoid 13,14-cleaving dioxygenase

       1.13.11.83  4-hydroxy-3-prenylphenylpyruvate oxygenase

       1.13.11.84  crocetin dialdehyde synthase

       1.13.11.85  exo-cleaving rubber dioxygenase

       1.13.11.86  5-aminosalicylate 1,2-dioxygenase

       1.13.11.87  endo-cleaving rubber dioxygenase

       1.13.11.88  isoeugenol monooxygenase

       1.13.11.89  (hydroxymethyl)phosphonate dioxygenase

       1.13.11.90  [1-hydroxy-2-(trimethylamino)ethyl]phosphonate dioxygenase (glycine-betaine-forming)

       1.13.11.91  3-mercaptopropionate dioxygenase

       1.13.11.92  fatty acid alpha-dioxygenase

       1.13.11.93  2-oxoadipate dioxygenase/decarboxylase

     1.13.12  With incorporation of one atom of oxygen (internal monooxygenases or internal mixed-function oxidases)

     1.13.99  Miscellaneous

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

   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