Nomenclature Committee of the
International Union of Biochemistry and Molecular Biology (NC-IUBMB)

Enzyme Nomenclature

Contents

Continued from contents EC 1.1 to EC 1.3

EC 1.4 Acting on the CH-NH2 group of donors

EC 1.4.1 With NAD+ or NADP+ as acceptor

EC 1.4.1.1 alanine dehydrogenase
EC 1.4.1.2 glutamate dehydrogenase
EC 1.4.1.3 glutamate dehydrogenase [NAD(P)+]
EC 1.4.1.4 glutamate dehydrogenase (NADP+)
EC 1.4.1.5 L-amino-acid dehydrogenase
EC 1.4.1.6 deleted, included in EC 1.4.4.1
EC 1.4.1.7 serine 2-dehydrogenase
EC 1.4.1.8 valine dehydrogenase (NADP+)
EC 1.4.1.9 leucine dehydrogenase
EC 1.4.1.10 glycine dehydrogenase
EC 1.4.1.11 L-erythro-3,5-diaminohexanoate dehydrogenase
EC 1.4.1.12 2,4-diaminopentanoate dehydrogenase
EC 1.4.1.13 glutamate synthase (NADPH)
EC 1.4.1.14 glutamate synthase (NADH)
EC 1.4.1.15 lysine dehydrogenase
EC 1.4.1.16 diaminopimelate dehydrogenase
EC 1.4.1.17 N-methylalanine dehydrogenase
EC 1.4.1.18 lysine 6-dehydrogenase
EC 1.4.1.19 tryptophan dehydrogenase
EC 1.4.1.20 phenylalanine dehydrogenase
EC 1.4.1.21 aspartate dehydrogenase
EC 1.4.1.22 deleted
EC 1.4.2 With a cytochrome as acceptor
EC 1.4.2.1 glycine dehydrogenase (cytochrome)

EC 1.4.3 With oxygen as acceptor

EC 1.4.3.1 D-aspartate oxidase
EC 1.4.3.2 L-amino-acid oxidase
EC 1.4.3.3 D-amino-acid oxidase
EC 1.4.3.4 amine oxidase
EC 1.4.3.5 pyridoxal 5'-phosphate synthase
EC 1.4.3.6 deleted now EC 1.4.3.21 and EC 1.4.3.22
EC 1.4.3.7 D-glutamate oxidase
EC 1.4.3.8 ethanolamine oxidase
EC 1.4.3.9 deleted, included in EC 1.4.3.4
EC 1.4.3.10 putrescine oxidase
EC 1.4.3.11 L-glutamate oxidase
EC 1.4.3.12 cyclohexylamine oxidase
EC 1.4.3.13 protein-lysine 6-oxidase
EC 1.4.3.14 L-lysine oxidase
EC 1.4.3.15 D-glutamate(D-aspartate) oxidase
EC 1.4.3.16 L-aspartate oxidase
EC 1.4.3.17 now EC 1.3.3.10
EC 1.4.3.18 deleted, not approved
EC 1.4.3.19 glycine oxidase
EC 1.4.3.20 L-lysine 6-oxidase
EC 1.4.3.21 primary-amine oxidase
EC 1.4.3.22 diamine oxidase
EC 1.4.4 With a disulfide as acceptor
EC 1.4.4.1 now EC 1.21.4.1
*EC 1.4.4.2 glycine dehydrogenase (decarboxylating)
EC 1.4.7 With an iron-sulfur protein as acceptor
EC 1.4.7.1 glutamate synthase (ferredoxin)

EC 1.4.99 With other acceptors

EC 1.4.99.1 D-amino-acid dehydrogenase
EC 1.4.99.2 taurine dehydrogenase
EC 1.4.99.3 amine dehydrogenase
EC 1.4.99.4 aralkylamine dehydrogenase
EC 1.4.99.5 glycine dehydrogenase (cyanide-forming)

EC 1.5 Acting on the CH-NH group of donors

EC 1.5.1 With NAD+ or NADP+ as acceptor

EC 1.5.1.1 pyrroline-2-carboxylate reductase
EC 1.5.1.2 pyrroline-5-carboxylate reductase
EC 1.5.1.3 dihydrofolate reductase
EC 1.5.1.4 deleted, included in EC 1.5.1.3
EC 1.5.1.5 methylenetetrahydrofolate dehydrogenase (NADP+)
EC 1.5.1.6 formyltetrahydrofolate dehydrogenase
EC 1.5.1.7 saccharopine dehydrogenase (NAD+, L-lysine-forming)
EC 1.5.1.8 saccharopine dehydrogenase (NADP+, L-lysine-forming)
EC 1.5.1.9 saccharopine dehydrogenase (NAD+, L-glutamate-forming)
EC 1.5.1.10 saccharopine dehydrogenase (NADP+, L-glutamate-forming)
EC 1.5.1.11 D-octopine dehydrogenase
EC 1.5.1.12 1-pyrroline-5-carboxylate dehydrogenase
EC 1.5.1.13 now EC 1.17.1.5
EC 1.5.1.14 deleted, included in EC 1.5.1.21
EC 1.5.1.15 methylenetetrahydrofolate dehydrogenase (NAD+)
EC 1.5.1.16 D-lysopine dehydrogenase
EC 1.5.1.17 alanopine dehydrogenase
EC 1.5.1.18 ephedrine dehydrogenase
EC 1.5.1.19 D-nopaline dehydrogenase
EC 1.5.1.20 methylenetetrahydrofolate reductase [NAD(P)H]
EC 1.5.1.21 Δ1-piperideine-2-carboxylate reductase
EC 1.5.1.22 strombine dehydrogenase
EC 1.5.1.23 tauropine dehydrogenase
EC 1.5.1.24 N5-(carboxyethyl)ornithine synthase
EC 1.5.1.25 thiomorpholine-carboxylate dehydrogenase
EC 1.5.1.26 β-alanopine dehydrogenase
EC 1.5.1.27 1,2-dehydroreticulinium reductase (NADPH)
EC 1.5.1.28 opine dehydrogenase
EC 1.5.1.29 FMN reductase
EC 1.5.1.30 flavin reductase
EC 1.5.1.31 berberine reductase
EC 1.5.1.32 vomilenine reductase
EC 1.5.1.33 pteridine reductase
EC 1.5.1.34 6,7-dihydropteridine reductase
EC 1.5.1.35 1-pyrroline dehydrogenase
EC 1.5.1.35 deleted, same as EC 1.2.1.19
EC 1.5.3 With oxygen as acceptor
EC 1.5.3.1 sarcosine oxidase
EC 1.5.3.2 N-methyl-L-amino-acid oxidase
EC 1.5.3.3 deleted
EC 1.5.3.4 N6-methyl-lysine oxidase
EC 1.5.3.5 (S)-6-hydroxynicotine oxidase
EC 1.5.3.6 (R)-6-hydroxynicotine oxidase
EC 1.5.3.7 L-pipecolate oxidase
EC 1.5.3.8 deleted, included in EC 1.3.3.8
EC 1.5.3.9 now EC 1.21.3.3
EC 1.5.3.10 dimethylglycine oxidase
EC 1.5.3.11 deleted, now EC 1.5.3.13, EC 1.5.3.14, EC 1.5.3.15, EC 1.5.3.16 and EC 1.5.3.17
EC 1.5.3.12 dihydrobenzophenanthridine oxidase
EC 1.5.3.13 N1-acetylpolyamine oxidase
EC 1.5.3.14 polyamine oxidase (propane-1,3-diamine-forming)
EC 1.5.3.15 N8-acetylspermidine oxidase (propane-1,3-diamine-forming)
EC 1.5.3.16 spermine oxidase
EC 1.5.3.17 non-specific polyamine oxidase
EC 1.5.4 With a disulfide as acceptor
EC 1.5.4.1 pyrimidodiazepine synthase
EC 1.5.5 With a quinone or similar compound as acceptor
EC 1.5.5.1 electron-transferring-flavoprotein dehydrogenase
EC 1.5.7 With an iron-sulfur protein as acceptor
EC 1.5.7.1 methylenetetrahydrofolate reductase (ferredoxin)
EC 1.5.8 With a flavin as acceptor
EC 1.5.8.1 dimethylamine dehydrogenase
EC 1.5.8.2 trimethylamine dehydrogenase
EC 1.5.99 With other acceptors
EC 1.5.99.1 sarcosine dehydrogenase
EC 1.5.99.2 dimethylglycine dehydrogenase
EC 1.5.99.3 L-pipecolate dehydrogenase
EC 1.5.99.4 nicotine dehydrogenase
EC 1.5.99.5 methylglutamate dehydrogenase
EC 1.5.99.6 spermidine dehydrogenase
EC 1.5.99.7 now EC 1.5.8.2
EC 1.5.99.8 proline dehydrogenase
EC 1.5.99.9 methylenetetrahydromethanopterin dehydrogenase
EC 1.5.99.10 now EC 1.5.8.1
EC 1.5.99.11 5,10-methylenetetrahydromethanopterin reductase
EC 1.5.99.12 cytokinin dehydrogenase
EC 1.6 Acting on NADH or NADPH

EC 1.6.1 With NAD+ or NADP+ as acceptor

EC 1.6.1.1 NAD(P)+ transhydrogenase (B-specific)
EC 1.6.1.2 NAD(P)+ transhydrogenase (AB-specific)
EC 1.6.2 With a heme protein as acceptor
EC 1.6.2.1 now EC 1.6.99.3
EC 1.6.2.2 cytochrome-b5 reductase
EC 1.6.2.3 deleted
EC 1.6.2.4 NADPH—hemoprotein reductase
EC 1.6.2.5 NADPH—cytochrome-c2 reductase
EC 1.6.2.6 leghemoglobin reductase
EC 1.6.3 With oxygen as acceptor
EC 1.6.3.1 NAD(P)H oxidase
EC 1.6.4 With a disulfide as acceptor
EC 1.6.4.1 now EC 1.8.1.6
EC 1.6.4.2 now EC 1.8.1.7
EC 1.6.4.3 now EC 1.8.1.4
EC 1.6.4.4 now EC 1.8.1.8
EC 1.6.4.5 now EC 1.8.1.9
EC 1.6.4.6 now EC 1.8.1.10
EC 1.6.4.7 now EC 1.8.1.11
EC 1.6.4.8 now EC 1.8.1.12
EC 1.6.4.9 now EC 1.8.1.13
EC 1.6.4.10 now EC 1.8.1.14
EC 1.6.5 With a quinone or similar compound as acceptor
EC 1.6.5.1 deleted
EC 1.6.5.2 NAD(P)H dehydrogenase (quinone)
EC 1.6.5.3 NADH dehydrogenase (ubiquinone)
EC 1.6.5.4 monodehydroascorbate reductase (NADH)
EC 1.6.5.5 NADPH:quinone reductase
EC 1.6.5.6 p-benzoquinone reductase (NADPH)
EC 1.6.5.7 2-hydroxy-1,4-benzoquinone reductase
EC 1.6.6 With a nitrogenous group as acceptor
EC 1.6.6.1 now EC 1.7.1.1
EC 1.6.6.2 now EC 1.7.1.2
EC 1.6.6.3 now EC 1.7.1.3
EC 1.6.6.4 now EC 1.7.1.4
EC 1.6.6.5 now EC 1.7.99.3
EC 1.6.6.6 now EC 1.7.1.5
EC 1.6.6.7 now EC 1.7.1.6
EC 1.6.6.8 now EC 1.7.1.7
EC 1.6.6.9 trimethylamine-N-oxide reductase
EC 1.6.6.10 now EC 1.7.1.9
EC 1.6.6.11 now EC 1.7.1.10
EC 1.6.6.12 now EC 1.7.1.11
EC 1.6.6.13 now EC 1.7.1.12
EC 1.6.7 With a iron-sulfur protein as acceptor
EC 1.6.7.1 now EC 1.18.1.2
EC 1.6.7.2 now EC 1.18.1.1
EC 1.6.8 With a flavin as acceptor
EC 1.6.8.1 now EC 1.5.1.29
EC 1.6.8.2 now EC 1.5.1.30
EC 1.6.99 With other acceptors
EC 1.6.99.1 NADPH dehydrogenase
EC 1.6.99.2 now EC 1.6.5.2
EC 1.6.99.3 NADH dehydrogenase
EC 1.6.99.4 now EC 1.18.1.2
EC 1.6.99.5 NADH dehydrogenase (quinone)
EC 1.6.99.6 NADPH dehydrogenase (quinone)
EC 1.6.99.7 now EC 1.5.1.34
EC 1.6.99.8 now EC 1.16.1.3
EC 1.6.99.9 now EC 1.16.1.4
EC 1.6.99.10 now included with EC 1.5.1.34
EC 1.6.99.11 now EC 1.16.1.5
EC 1.6.99.12 now EC 1.16.1.6
EC 1.6.99.13 now EC 1.16.1.7
EC 1.7 Acting on other nitrogenous compounds as donors

EC 1.7.1 With NAD+ or NADP+ as acceptor

EC 1.7.1.1 nitrate reductase (NADH)
EC 1.7.1.2 nitrate reductase [NAD(P)H]
EC 1.7.1.3 nitrate reductase (NADPH)
EC 1.7.1.4 nitrite reductase [NAD(P)H]
EC 1.7.1.5 hyponitrite reductase
EC 1.7.1.6 azobenzene reductase
EC 1.7.1.7 GMP reductase
EC 1.7.1.8 Deleted entry: withdrawn in the light of further information on the acceptor
EC 1.7.1.9 nitroquinoline-N-oxide reductase
EC 1.7.1.10 hydroxylamine reductase (NADH)
EC 1.7.1.11 4-(dimethylamino)phenylazoxybenzene reductase
EC 1.7.1.12 N-hydroxy-2-acetamidofluorene reductase
EC 1.7.1.13 preQ1 reductase
EC 1.7.2 With a cytochrome as acceptor
EC 1.7.2.1 nitrite reductase (NO-forming)
EC 1.7.2.2 nitrite reductase (cytochrome; ammonia-forming)
EC 1.7.2.3 trimethylamine-N-oxide reductase (cytochrome c)
EC 1.7.3 With oxygen as acceptor
EC 1.7.3.1 nitroalkane oxidase
EC 1.7.3.2 acetylindoxyl oxidase
EC 1.7.3.3 urate oxidase
EC 1.7.3.4 hydroxylamine oxidase
EC 1.7.3.5 3-aci-nitropropanoate oxidase
EC 1.7.7 With an iron-sulfur protein as acceptor
EC 1.7.7.1 ferredoxin—nitrite reductase
EC 1.7.7.2 ferredoxin—nitrate reductase
EC 1.7.99 With other acceptors
EC 1.7.99.1 hydroxylamine reductase
EC 1.7.99.2 deleted
EC 1.7.99.3 included with EC 1.7.2.1
EC 1.7.99.4 nitrate reductase
EC 1.7.99.5 deleted, now included with EC 1.5.1.20
EC 1.7.99.6 nitrous-oxide reductase
EC 1.7.99.7 nitric-oxide reductase
EC 1.7.99.8 hydroxylamine oxidoreductase
EC 1.8 Acting on a sulfur group of donors

EC 1.8.1 With NAD+ or NADP+ as acceptor

EC 1.8.1.1 deleted
EC 1.8.1.2 sulfite reductase (NADPH)
EC 1.8.1.3 hypotaurine dehydrogenase
EC 1.8.1.4 dihydrolipoyl dehydrogenase
EC 1.8.1.5 2-oxopropyl-CoM reductase (carboxylating)
EC 1.8.1.6 cystine reductase
EC 1.8.1.7 glutathione-disulfide reductase
EC 1.8.1.8 protein-disulfide reductase
EC 1.8.1.9 thioredoxin-disulfide reductase
EC 1.8.1.10 CoA-glutathione reductase
EC 1.8.1.11 asparagusate reductase
EC 1.8.1.12 trypanothione-disulfide reductase
EC 1.8.1.13 bis-γ-glutamylcystine reductase
EC 1.8.1.14 CoA-disulfide reductase
EC 1.8.1.15 mycothione reductase
EC 1.8.2 With a cytochrome as acceptor
EC 1.8.2.1 sulfite dehydrogenase
EC 1.8.2.2 thiosulfate dehydrogenase
EC 1.8.3 With oxygen as acceptor
EC 1.8.3.1 sulfite oxidase
EC 1.8.3.2 thiol oxidase
EC 1.8.3.3 glutathione oxidase
EC 1.8.3.4 methanethiol oxidase
EC 1.8.3.5 prenylcysteine oxidase
EC 1.8.4 With a disulfide as acceptor
EC 1.8.4.1 glutathione—homocystine transhydrogenase
EC 1.8.4.2 protein-disulfide reductase (glutathione)
EC 1.8.4.3 glutathione—CoA-glutathione transhydrogenase
EC 1.8.4.4 glutathione—cystine transhydrogenase
EC 1.8.4.5 now EC 1.8.4.13 and EC 1.8.4.14
EC 1.8.4.6 now EC 1.8.4.11
EC 1.8.4.7 enzyme-thiol transhydrogenase (glutathione-disulfide)
EC 1.8.4.8 phosphoadenylyl-sulfate reductase (thioredoxin)
EC 1.8.4.9 adenylyl-sulfate reductase (glutathione)
EC 1.8.4.10 adenylyl-sulfate reductase (thioredoxin)
EC 1.8.4.11 peptide-methionine (S)-S-oxide reductase
EC 1.8.4.12 peptide-methionine (R)-S-oxide reductase
EC 1.8.4.13 L-methionine (S)-S-oxide reductase
EC 1.8.4.14 L-methionine (R)-S-oxide reductase
EC 1.8.5 With a quinone or similar compound as acceptor
EC 1.8.5.1 glutathione dehydrogenase (ascorbate)
EC 1.8.5.2 thiosulfate dehydrogenase (quinone)
EC 1.8.6 With an nitrogenous group as acceptor
EC 1.8.6.1 deleted, included in EC 2.5.1.18
EC 1.8.7 With an iron-sulfur protein as acceptor
EC 1.8.7.1 sulfite reductase (ferredoxin)
EC 1.8.98 With other, known, acceptors
EC 1.8.98.1 CoB—CoM heterodisulfide reductase
EC 1.8.98.2 sulfiredoxin
EC 1.8.99 With other acceptors
EC 1.8.99.1 sulfite reductase
EC 1.8.99.2 adenylyl-sulfate reductase
EC 1.8.99.3 hydrogensulfite reductase
EC 1.8.99.4 now EC 1.8.4.8
EC 1.9 Acting on a heme group of donors

EC 1.9.3 With oxygen as acceptor

EC 1.9.3.1 cytochrome-c oxidase
EC 1.9.3.2 included with EC 1.7.2.1
EC 1.9.6 With a nitrogenous group as acceptor
EC 1.9.6.1 nitrate reductase (cytochrome)
EC 1.9.99 With other acceptors
EC 1.9.99.1 iron—cytochrome-c reductase
EC 1.10 Acting on diphenols and related substances as donors

EC 1.10.1 With NAD+ or NADP+ as acceptor

EC 1.10.1.1 trans-acenaphthene-1,2-diol dehydrogenase
EC 1.10.2 With a cytochrome as acceptor
EC 1.10.2.1 L-ascorbate—cytochrome-b5 reductase
EC 1.10.2.2 ubiquinol—cytochrome-c reductase
EC 1.10.3 With oxygen as acceptor
EC 1.10.3.1 catechol oxidase
EC 1.10.3.2 laccase
EC 1.10.3.3 L-ascorbate oxidase
EC 1.10.3.4 o-aminophenol oxidase
EC 1.10.3.5 3-hydroxyanthranilate oxidase
EC 1.10.3.6 rifamycin-B oxidase
EC 1.10.3.7 now EC 1.21.3.4
EC 1.10.3.8 now EC 1.21.3.5
EC 1.10.99 With other acceptors
EC 1.10.99.1 plastoquinol—plastocyanin reductase
EC 1.10.99.2 ribosyldihydronicotinamide dehydrogenase (quinone)
EC 1.10.99.3 violaxanthin de-epoxidase
EC 1.11 Acting on a peroxide as acceptor

EC 1.11.1 Peroxidases

EC 1.11.1.1 NADH peroxidase
EC 1.11.1.2 NADPH peroxidase
EC 1.11.1.3 fatty-acid peroxidase
EC 1.11.1.4 now EC 1.13.11.11
EC 1.11.1.5 cytochrome-c peroxidase
EC 1.11.1.6 catalase
EC 1.11.1.7 peroxidase
EC 1.11.1.8 iodide peroxidase
EC 1.11.1.9 glutathione peroxidase
EC 1.11.1.10 chloride peroxidase
EC 1.11.1.11 L-ascorbate peroxidase
EC 1.11.1.12 phospholipid-hydroperoxide glutathione peroxidase
EC 1.11.1.13 manganese peroxidase
EC 1.11.1.14 lignin peroxidase
EC 1.11.1.15 peroxiredoxin
EC 1.11.1.16 versatile peroxidase
EC 1.12 Acting on hydrogen as donor

EC 1.12.1 With NAD+ or NADP+ as acceptor

EC 1.12.1.1 now EC 1.18.99.1
EC 1.12.1.2 hydrogen dehydrogenase
EC 1.12.1.3 hydrogen dehydrogenase (NADP+)
EC 1.12.2 With a cytochrome as acceptor
EC 1.12.2.1 cytochrome-c3 hydrogenase
EC 1.12.5 With a quinone or similar compound as acceptor
EC 1.12.5.1 hydrogen:quinone oxidoreductase
EC 1.12.7 With an iron-sulfur protein as acceptor
EC 1.12.7.1 now EC 1.18.99.1
EC 1.12.7.2 ferredoxin hydrogenase
EC 1.12.98 With other known acceptors
EC 1.12.98.1 coenzyme F420 hydrogenase
EC 1.12.98.2 5,10-methenyltetrahydromethanopterin hydrogenase
EC 1.12.98.3 Methanosarcina-phenazine hydrogenase
EC 1.12.99 With other acceptors
EC 1.12.99.1 now EC 1.12.98.1
EC 1.12.99.2 deleted, composed of EC 1.12.98.3 and EC 1.8.98.1
EC 1.12.99.3 now EC 1.12.5.1
EC 1.12.99.4 now EC 1.12.98.2
EC 1.12.99.5 deleted, identical to EC 1.13.11.47
EC 1.12.99.6 hydrogenase (acceptor)
EC 1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)

EC 1.13.11 With incorporation of two atoms of oxygen

EC 1.13.11.1 catechol 1,2-dioxygenase
EC 1.13.11.2 catechol 2,3-dioxygenase
EC 1.13.11.3 protocatechuate 3,4-dioxygenase
EC 1.13.11.4 gentisate 1,2-dioxygenase
EC 1.13.11.5 homogentisate 1,2-dioxygenase
EC 1.13.11.6 3-hydroxyanthranilate 3,4-dioxygenase
EC 1.13.11.7 deleted
EC 1.13.11.8 protocatechuate 4,5-dioxygenase
EC 1.13.11.9 2,5-dihydroxypyridine 5,6-dioxygenase
EC 1.13.11.10 7,8-dihydroxykynurenate 8,8a-dioxygenase
EC 1.13.11.11 tryptophan 2,3-dioxygenase
EC 1.13.11.12 lipoxygenase
EC 1.13.11.13 ascorbate 2,3-dioxygenase
EC 1.13.11.14 2,3-dihydroxybenzoate 3,4-dioxygenase
EC 1.13.11.15 3,4-dihydroxyphenylacetate 2,3-dioxygenase
EC 1.13.11.16 3-carboxyethylcatechol 2,3-dioxygenase
EC 1.13.11.17 indole 2,3-dioxygenase
EC 1.13.11.18 sulfur dioxygenase
EC 1.13.11.19 cysteamine dioxygenase
EC 1.13.11.20 cysteine dioxygenase
EC 1.13.11.21 now EC 1.14.99.36
EC 1.13.11.22 caffeate 3,4-dioxygenase
EC 1.13.11.23 2,3-dihydroxyindole 2,3-dioxygenase
EC 1.13.11.24 quercetin 2,3-dioxygenase
EC 1.13.11.25 3,4-dihydroxy-9,10-secoandrosta-1,3,5(10)-triene-9,17-dione 4,5-dioxygenase
EC 1.13.11.26 peptide-tryptophan 2,3-dioxygenase
EC 1.13.11.27 4-hydroxyphenylpyruvate dioxygenase
EC 1.13.11.28 2,3-dihydroxybenzoate 2,3-dioxygenase
EC 1.13.11.29 stizolobate synthase
EC 1.13.11.30 stizolobinate synthase
EC 1.13.11.31 arachidonate 12-lipoxygenase
EC 1.13.11.32 transferred now EC 1.13.12.16
EC 1.13.11.33 arachidonate 15-lipoxygenase
EC 1.13.11.34 arachidonate 5-lipoxygenase
EC 1.13.11.35 pyrogallol 1,2-oxygenase
EC 1.13.11.36 chloridazon-catechol dioxygenase
EC 1.13.11.37 hydroxyquinol 1,2-dioxygenase
EC 1.13.11.38 1-hydroxy-2-naphthoate 1,2-dioxygenase
EC 1.13.11.39 biphenyl-2,3-diol 1,2-dioxygenase
EC 1.13.11.40 arachidonate 8-lipoxygenase
EC 1.13.11.41 2,4'-dihydroxyacetophenone dioxygenase
EC 1.13.11.42 deleted
EC 1.13.11.43 lignostilbene αβ-dioxygenase
EC 1.13.11.44 linoleate diol synthase
EC 1.13.11.45 linoleate 11-lipoxygenase
EC 1.13.11.46 4-hydroxymandelate synthase
EC 1.13.11.47 3-hydroxy-4-oxoquinoline 2,4-dioxygenase
EC 1.13.11.48 3-hydroxy-2-methyl-quinolin-4-one 2,4-dioxygenase
EC 1.13.11.49 chlorite O2-lyase
EC 1.13.11.50 acetylacetone-cleaving enzyme
EC 1.13.11.51 9-cis-epoxycarotenoid dioxygenase
EC 1.13.11.52 indoleamine 2,3-dioxygenase
EC 1.13.11.53 acireductone dioxygenase (Ni2+-requiring)
EC 1.13.11.54 acireductone dioxygenase [iron(II)-requiring]
EC 1.13.11.55 sulfur oxygenase/reductase
EC 1.13.12 With incorporation of one atom of oxygen (internal monooxygenases or internal mixed function oxidases)
EC 1.13.12.1 arginine 2-monooxygenase
EC 1.13.12.2 lysine 2-monooxygenase
EC 1.13.12.3 tryptophan 2-monooxygenase
EC 1.13.12.4 lactate 2-monooxygenase
EC 1.13.12.5 Renilla-luciferin 2-monooxygenase
EC 1.13.12.6 Cypridina-luciferin 2-monooxygenase
EC 1.13.12.7 Photinus-luciferin 4-monooxygenase (ATP-hydrolysing)
EC 1.13.12.8 Watasenia-luciferin 2-monooxygenase
EC 1.13.12.9 phenylalanine 2-monooxygenase
EC 1.13.12.10 lysine 6-monooxygenase
EC 1.13.12.10 Deleted, covered by EC 1.14.13.59
EC 1.13.12.11 now EC 1.14.13.8
EC 1.13.12.12 apo-β-carotenoid-14',13'-dioxygenase
EC 1.13.12.13 Oplophorus-luciferin 2-monooxygenase
EC 1.13.12.14 chlorophyllide a oxygenase
EC 1.13.12.15 3,4-dihydroxyphenylalanine oxidative deaminase
EC 1.13.12.16 nitronate monooxygenase
EC 1.13.99 Miscellaneous
EC 1.13.99.1 inositol oxygenase
EC 1.13.99.2 now EC 1.14.12.10
EC 1.13.99.3 tryptophan 2'-dioxygenase
EC 1.13.99.4 now EC 1.14.12.9
EC 1.13.99.5 now EC 1.13.11.47
EC 1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen

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

EC 1.14.11.1 γ-butyrobetaine dioxygenase
EC 1.14.11.2 procollagen-proline dioxygenase
EC 1.14.11.3 pyrimidine-deoxynucleoside 2'-dioxygenase
EC 1.14.11.4 procollagen-lysine 5-dioxygenase
EC 1.14.11.5 deleted, included in EC 1.14.11.6
EC 1.14.11.6 thymine dioxygenase
EC 1.14.11.7 procollagen-proline 3-dioxygenase
EC 1.14.11.8 trimethyllysine dioxygenase
EC 1.14.11.9 flavanone 3-dioxygenase
EC 1.14.11.10 pyrimidine-deoxynucleoside 1'-dioxygenase
EC 1.14.11.11 hyoscyamine (6S)-dioxygenase
EC 1.14.11.12 gibberellin-44 dioxygenase
EC 1.14.11.13 gibberellin 2β-dioxygenase
EC 1.14.11.14 6β-hydroxyhyoscyamine epoxidase
EC 1.14.11.15 gibberellin 3β-dioxygenase
EC 1.14.11.16 peptide-aspartate β-dioxygenase
EC 1.14.11.17 taurine dioxygenase
EC 1.14.11.18 phytanoyl-CoA dioxygenase
EC 1.14.11.19 leucocyanidin oxygenase
EC 1.14.11.20 deacetoxyvindoline 4-hydroxylase
EC 1.14.11.21 clavaminate synthase
EC 1.14.11.22 flavone synthase
EC 1.14.11.23 flavonol synthase
EC 1.14.11.24 2'-deoxymugineic-acid 2'-dioxygenase
EC 1.14.11.25 mugineic-acid 3-dioxygenase
EC 1.14.11.26 deacetoxycephalosporin-C hydroxylase
EC 1.14.11.27 [histone-H3]-lysine-36 demethylase
EC 1.14.11.28 proline 3-hydroxylase
EC 1.14.12 With NADH or NADPH as one donor, and incorporation of two atoms of oxygen into one donor
EC 1.14.12.1 anthranilate 1,2-dioxygenase (deaminating, decarboxylating)
EC 1.14.12.2 now EC 1.14.13.35
EC 1.14.12.3 benzene 1,2-dioxygenase
EC 1.14.12.4 3-hydroxy-2-methylpyridinecarboxylate dioxygenase
EC 1.14.12.5 5-pyridoxate dioxygenase
EC 1.14.12.6 now EC 1.14.13.66
EC 1.14.12.7 phthalate 4,5-dioxygenase
EC 1.14.12.8 4-sulfobenzoate 3,4-dioxygenase
EC 1.14.12.9 4-chlorophenylacetate 3,4-dioxygenase
EC 1.14.12.10 benzoate 1,2-dioxygenase
EC 1.14.12.11 toluene dioxygenase
EC 1.14.12.12 naphthalene 1,2-dioxygenase
EC 1.14.12.13 2-chlorobenzoate 1,2-dioxygenase
EC 1.14.12.14 2-aminobenzenesulfonate 2,3-dioxygenase
EC 1.14.12.15 terephthalate 1,2-dioxygenase
EC 1.14.12.16 2-hydroxyquinoline 5,6-dioxygenase
EC 1.14.12.17 nitric oxide dioxygenase
EC 1.14.12.18 biphenyl 2,3-dioxygenase
EC 1.14.12.19 3-phenylpropionate dioxygenase
EC 1.14.12.20 pheophorbide a oxygenase
EC 1.14.13 With NADH or NADPH as one donor, and incorporation of one atom of oxygen
EC 1.14.13.1 salicylate 1-monooxygenase
EC 1.14.13.2 4-hydroxybenzoate 3-monooxygenase
EC 1.14.13.3 4-hydroxyphenylacetate 3-monooxygenase
EC 1.14.13.4 melilotate 3-monooxygenase
EC 1.14.13.5 imidazoleacetate 4-monooxygenase
EC 1.14.13.6 orcinol 2-monooxygenase
EC 1.14.13.7 phenol 2-monooxygenase
EC 1.14.13.8 flavin-containing monooxygenase
EC 1.14.13.9 kynurenine 3-monooxygenase
EC 1.14.13.10 2,6-dihydroxypyridine 3-monooxygenase
EC 1.14.13.11 trans-cinnamate 4-monooxygenase
EC 1.14.13.12 benzoate 4-monooxygenase
EC 1.14.13.13 calcidiol 1-monooxygenase
EC 1.14.13.14 trans-cinnamate 2-monooxygenase
EC 1.14.13.15 cholestanetriol 26-monooxygenase
EC 1.14.13.16 cyclopentanone monooxygenase
EC 1.14.13.17 cholesterol 7α-monooxygenase
EC 1.14.13.18 4-hydroxyphenylacetate 1-monooxygenase
EC 1.14.13.19 taxifolin 8-monooxygenase
EC 1.14.13.20 2,4-dichlorophenol 6-monooxygenase
EC 1.14.13.21 flavonoid 3'-monooxygenase
EC 1.14.13.22 cyclohexanone monooxygenase
EC 1.14.13.23 3-hydroxybenzoate 4-monooxygenase
EC 1.14.13.24 3-hydroxybenzoate 6-monooxygenase
EC 1.14.13.25 methane monooxygenase
EC 1.14.13.26 phosphatidylcholine 12-monooxygenase
EC 1.14.13.27 4-aminobenzoate 1-monooxygenase
EC 1.14.13.28 3,9-dihydroxypterocarpan 6a-monooxygenase
EC 1.14.13.29 4-nitrophenol 2-monooxygenase
EC 1.14.13.30 leukotriene-B4 20-monooxygenase
EC 1.14.13.31 2-nitrophenol 2-monooxygenase
EC 1.14.13.32 albendazole monooxygenase
EC 1.14.13.33 4-hydroxybenzoate 3-monooxygenase [NAD(P)H]
EC 1.14.13.34 leukotriene-E4 20-monooxygenase
EC 1.14.13.35 anthranilate 3-monooxygenase (deaminating)
EC 1.14.13.36 5-O-(4-coumaroyl)-D-quinate 3'-monooxygenase
EC 1.14.13.37 methyltetrahydroprotoberberine 14-monooxygenase
EC 1.14.13.38 anhydrotetracycline monooxygenase
EC 1.14.13.39 nitric-oxide synthase
EC 1.14.13.40 anthraniloyl-CoA monooxygenase
EC 1.14.13.41 tyrosine N-monooxygenase
EC 1.14.13.42 hydroxyphenylacetonitrile 2-monooxygenase
EC 1.14.13.43 questin monooxygenase
EC 1.14.13.44 2-hydroxybiphenyl 3-monooxygenase
EC 1.14.13.45 now EC 1.14.18.2
EC 1.14.13.46 (-)-menthol monooxygenase
EC 1.14.13.47 (S)-limonene 3-monooxygenase
EC 1.14.13.48 (S)-limonene 6-monooxygenase
EC 1.14.13.49 (S)-limonene 7-monooxygenase
EC 1.14.13.50 pentachlorophenol monooxygenase
EC 1.14.13.51 6-oxocineole dehydrogenase
EC 1.14.13.52 isoflavone 3'-hydroxylase
EC 1.14.13.53 4'-methoxyisoflavone 2'-hydroxylase
EC 1.14.13.54 ketosteroid monooxygenase
EC 1.14.13.55 protopine 6-monooxygenase
EC 1.14.13.56 dihydrosanguinarine 10-monooxygenase
EC 1.14.13.57 dihydrochelirubine 12-monooxygenase
EC 1.14.13.58 benzoyl-CoA 3-monooxygenase
EC 1.14.13.59 L-lysine 6-monooxygenase (NADPH)
EC 1.14.13.60 27-hydroxycholesterol 7α-monooxygenase
EC 1.14.13.61 2-hydroxyquinoline 8-monooxygenase
EC 1.14.13.62 4-hydroxyquinoline 3-monooxygenase
EC 1.14.13.63 3-hydroxyphenylacetate 6-hydroxylase
EC 1.14.13.64 4-hydroxybenzoate 1-hydroxylase
EC 1.14.13.65 deleted
EC 1.14.13.66 2-hydroxycyclohexanone 2-monooxygenase
EC 1.14.13.67 quinine 3-monooxygenase
EC 1.14.13.68 4-hydroxyphenylacetaldehyde oxime monooxygenase
EC 1.14.13.69 alkene monooxygenase
EC 1.14.13.70 sterol 14-demethylase
EC 1.14.13.71 N-methylcoclaurine 3'-monooxygenase
EC 1.14.13.72 methylsterol monooxygenase
EC 1.14.13.73 tabersonine 16-hydroxylase
EC 1.14.13.74 7-deoxyloganin 7-hydroxylase
EC 1.14.13.75 vinorine hydroxylase
EC 1.14.13.76 taxane 10β-hydroxylase
EC 1.14.13.77 taxane 13α-hydroxylase
EC 1.14.13.78 ent-kaurene oxidase
EC 1.14.13.79 ent-kaurenoic acid oxidase
EC 1.14.13.80 (R)-limonene 6-monooxygenase
EC 1.14.13.81 magnesium-protoporphyrin IX monomethyl ester (oxidative) cyclase
EC 1.14.13.82 vanillate monooxygenase
EC 1.14.13.83 precorrin-3B synthase
EC 1.14.13.84 4-hydroxyacetophenone monooxygenase
EC 1.14.13.85 glyceollin synthase
EC 1.14.13.86 2-hydroxyisoflavanone synthase
EC 1.14.13.87 licodione synthase
EC 1.14.13.88 flavonoid 3',5'-hydroxylase
EC 1.14.13.89 isoflavone 2'-hydroxylase
EC 1.14.13.90 zeaxanthin epoxidase
EC 1.14.13.91 deoxysarpagine hydroxylase
EC 1.14.13.92 phenylacetone monooxygenase
EC 1.14.13.93 (+)-abscisic acid 8'-hydroxylase
EC 1.14.13.94 lithocholate 6β-hydroxylase
EC 1.14.13.95 7α-hydroxycholest-4-en-3-one 12α-hydroxylase
EC 1.14.13.96 5β-cholestane-3α,7α-diol 12α-hydroxylase
EC 1.14.13.97 taurochenodeoxycholate 6α-hydroxylase
EC 1.14.13.98 cholesterol 24-hydroxylase
EC 1.14.13.99 24-hydroxycholesterol 7α-hydroxylase
EC 1.14.13.100 25-hydroxycholesterol 7α-hydroxylase
EC 1.14.13.101 senecionine N-oxygenase
EC 1.14.13.102 psoralen synthase
EC 1.14.13.103 8-dimethylallylnaringenin 2'-hydroxylase
EC 1.14.13.104 (+)-menthofuran synthase
EC 1.14.13.105 monocyclic monoterpene ketone monooxygenase
EC 1.14.13.106 epi-isozizaene 5-monooxygenase
EC 1.14.13.107 limonene 1,2-monooxygenase
EC 1.14.13.108 abietadiene hydroxylase
EC 1.14.13.109 abietadienol hydroxylase
EC 1.14.13.110 geranylgeraniol 18-hydroxylase
EC 1.14.14 With reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen
EC 1.14.14.1 unspecific monooxygenase
EC 1.14.14.2 deleted, included in EC 1.14.14.1
EC 1.14.14.3 alkanal monooxygenase (FMN-linked)
EC 1.14.14.4 deleted, identical to EC 1.14.15.7
EC 1.14.14.5 alkanesulfonate monooxygenase
EC 1.14.14.6 methanesulfonate monooxygenase
EC 1.14.14.7 tryptophan 7-halogenase
EC 1.14.15 With reduced iron-sulfur protein as one donor, and incorporation of one atom of oxygen
EC 1.14.15.1 camphor 5-monooxygenase
EC 1.14.15.2 camphor 1,2-monooxygenase
EC 1.14.15.3 alkane 1-monooxygenase
EC 1.14.15.4 steroid 11β-monooxygenase
EC 1.14.15.5 corticosterone 18-monooxygenase
EC 1.14.15.6 cholesterol monooxygenase (side-chain-cleaving)
EC 1.14.15.7 choline monooxygenase
EC 1.14.16 With reduced pteridine as one donor, and incorporation of one atom of oxygen
EC 1.14.16.1 phenylalanine 4-monooxygenase
EC 1.14.16.2 tyrosine 3-monooxygenase
EC 1.14.16.3 anthranilate 3-monooxygenase
EC 1.14.16.4 tryptophan 5-monooxygenase
EC 1.14.16.5 glyceryl-ether monooxygenase
EC 1.14.16.6 mandelate 4-monooxygenase
EC 1.14.17 With reduced ascorbate as one donor, and incorporation of one atom of oxygen
EC 1.14.17.1 dopamine β-monooxygenase
EC 1.14.17.2 deleted, included in EC 1.14.18.1
EC 1.14.17.3 peptidylglycine monooxygenase
EC 1.14.17.4 aminocyclopropanecarboxylate oxidase
EC 1.14.18 With another compound as one donor, and incorporation of one atom of oxygen
EC 1.14.18.1 monophenol monooxygenase
EC 1.14.18.2 CMP-N-acetylneuraminate monooxygenase
EC 1.14.19 With oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water
EC 1.14.19.1 stearoyl-CoA 9-desaturase
EC 1.14.19.2 acyl-[acyl-carrier-protein] desaturase
EC 1.14.19.3 linoleoyl-CoA desaturase
EC 1.14.19.4 Δ8-fatty-acid desaturase
EC 1.14.19.5 Δ11-fatty-acid desaturase
EC 1.14.19.6 Δ12-fatty-acid desaturase
EC 1.14.20 With 2-oxoglutarate as one donor, and the other dehydrogenated
EC 1.14.20.1 deacetoxycephalosporin-C synthase
EC 1.14.21 With NADH or NADPH as one donor, and the other dehydrogenated
EC 1.14.21.1 (S)-stylopine synthase
EC 1.14.21.2 (S)-cheilanthifoline synthase
EC 1.14.21.3 berbamunine synthase
EC 1.14.21.4 salutaridine synthase
EC 1.14.21.5 (S)-canadine synthase
EC 1.14.21.6 lathosterol oxidase
EC 1.14.21.7 biflaviolin synthase
EC 1.14.99 Miscellaneous
EC 1.14.99.1 prostaglandin-endoperoxide synthase
EC 1.14.99.2 kynurenine 7,8-hydroxylase
EC 1.14.99.3 heme oxygenase
EC 1.14.99.4 progesterone monooxygenase
EC 1.14.99.5 now EC 1.14.19.1
EC 1.14.99.6 now EC 1.14.19.2
EC 1.14.99.7 squalene monooxygenase
EC 1.14.99.8 deleted, included in EC 1.14.14.1
EC 1.14.99.9 steroid 17α-monooxygenase
EC 1.14.99.10 steroid 21-monooxygenase
EC 1.14.99.11 estradiol 6β-monooxygenase
EC 1.14.99.12 4-androstene-3,17-dione monooxygenase
EC 1.14.99.13 now EC 1.14.13.23
EC 1.14.99.14 progesterone 11α-monooxygenase
EC 1.14.99.15 4-methoxybenzoate monooxygenase (O-demethylating)
EC 1.14.99.16 now EC 1.14.13.72
EC 1.14.99.17 now EC 1.14.16.5
EC 1.14.99.18 deleted
EC 1.14.99.19 plasmanylethanolamine desaturase
EC 1.14.99.20 phylloquinone monooxygenase (2,3-epoxidizing)
EC 1.14.99.21 Latia-luciferin monooxygenase (demethylating)
EC 1.14.99.22 ecdysone 20-monooxygenase
EC 1.14.99.23 3-hydroxybenzoate 2-monooxygenase
EC 1.14.99.24 steroid 9α-monooxygenase
EC 1.14.99.25 now EC 1.14.19.3
EC 1.14.99.26 2-hydroxypyridine 5-monooxygenase
EC 1.14.99.27 juglone 3-monooxygenase
EC 1.14.99.28 linalool 8-monooxygenase
EC 1.14.99.29 deoxyhypusine monooxygenase
EC 1.14.99.30 carotene 7,8-desaturase
EC 1.14.99.31 myristoyl-CoA 11-(E) desaturase
EC 1.14.99.32 myristoyl-CoA 11-(Z) desaturase
EC 1.14.99.33 Δ12-fatty acid dehydrogenase
EC 1.14.99.34 monoprenyl isoflavone epoxidase
EC 1.14.99.35 thiophene-2-carbonyl-CoA monooxygenase
EC 1.14.99.36 β-carotene 15,15'-monooxygenase
EC 1.14.99.37 taxadiene 5α-hydroxylase
EC 1.14.99.38 cholesterol 25-hydroxylase
EC 1.15 Acting on superoxide as acceptor

EC 1.15.1.1 superoxide dismutase
EC 1.15.1.2 superoxide reductase
EC 1.16 Oxidizing metal ions

EC 1.16.1 With NAD+ or NADP+ as acceptor

EC 1.16.1.1 mercury(II) reductase
EC 1.16.1.2 diferric-transferrin reductase
EC 1.16.1.3 aquacobalamin reductase
EC 1.16.1.4 cob(II)alamin reductase
EC 1.16.1.5 aquacobalamin reductase (NADPH)
EC 1.16.1.6 cyanocobalamin reductase (cyanide-eliminating)
EC 1.16.1.7 ferric-chelate reductase
EC 1.16.1.8 [methionine synthase] reductase
EC 1.16.3 With oxygen as acceptor

EC 1.16.3.1 ferroxidase
EC 1.16.8 With flavin as acceptor

EC 1.16.8.1 cob(II)yrinic acid a,c-diamide reductase
EC 1.17 Acting on CH or CH2 groups

EC 1.17.1 With NAD+ or NADP+ as acceptor

EC 1.17.1.1 CDP-4-dehydro-6-deoxyglucose reductase
EC 1.17.1.2 4-hydroxy-3-methylbut-2-enyl diphosphate reductase
EC 1.17.1.3 leucoanthocyanidin reductase EC 1.17.1.4 xanthine dehydrogenase
EC 1.17.1.5 nicotinate dehydrogenase
EC 1.17.1.6 now EC 1.17.99.5
EC 1.17.3 With oxygen as acceptor
EC 1.17.3.1 pteridine oxidase
EC 1.17.3.2 xanthine oxidase
EC 1.17.3.3 6-hydroxynicotinate dehydrogenase
EC 1.17.4 With a disulfide as acceptor
EC 1.17.4.1 ribonucleoside-diphosphate reductase
EC 1.17.4.2 ribonucleoside-triphosphate reductase
EC 1.17.4.3 transferred now EC 1.17.7.1
EC 1.17.5 With a quinone or similar compound as acceptor
EC 1.17.5.1 phenylacetyl-CoA dehydrogenase
EC 1.17.7 With an iron-sulfur protein as acceptor
EC 1.17.7.1 (E)-4-hydroxy-3-methylbut-2-enyl-diphosphate synthase
EC 1.17.99 With other acceptors
EC 1.17.99.1 4-cresol dehydrogenase (hydroxylating)
EC 1.17.99.2 ethylbenzene hydroxylase
EC 1.17.99.3 3α,7α,12α-trihydroxy-5β-cholestanoyl-CoA 24-hydroxylase
EC 1.17.99.4 uracil/thymine dehydrogenase
EC 1.17.99.5 bile-acid 7α-dehydroxylase
EC 1.18 Acting on iron-sulfur proteins as donors

EC 1.18.1 With NAD+ or NADP+ as acceptor

EC 1.18.1.1 rubredoxin—NAD+ reductase
EC 1.18.1.2 ferredoxin—NADP+ reductase
EC 1.18.1.3 ferredoxin—NAD+ reductase
EC 1.18.1.4 rubredoxin—NAD(P)+ reductase
EC 1.18.3 With H+ as acceptor
EC 1.18.3.1 now EC 1.18.99.1
EC 1.18.6 With dinitrogen as acceptor
EC 1.18.6.1 nitrogenase
EC 1.18.96 With other, known, acceptors
EC 1.18.96.1 now EC 1.15.1.2
EC 1.18.99 With H+ as acceptors
EC 1.18.99.1 now EC 1.12.7.2
EC 1.19 Acting on reduced flavodoxin as donor

EC 1.19.6 With dinitrogen as acceptor

EC 1.19.6.1 nitrogenase (flavodoxin)
EC 1.20. Acting on phosphorus or arsenic in donors

EC 1.20.1 Acting on phosphorus or arsenic in donors, with NAD(P)+ as acceptor

EC 1.20.1.1 phosphonate dehydrogenase
EC 1.20.4 Acting on phosphorus or arsenic in donors, with disulfide as acceptor
EC 1.20.4.1 arsenate reductase (glutaredoxin)
EC 1.20.4.2 methylarsonate reductase
EC 1.20.98 Acting on phosphorus or arsenic in donors, with other, known acceptors
EC 1.20.98.1 arsenate reductase (azurin)
EC 1.20.99 Acting on phosphorus or arsenic in donors, with other acceptors
EC 1.20.99.1 arsenate reductase (donor)
EC 1.21 Acting on X-H and Y-H to form an X-Y bond

EC 1.21.3 With oxygen as acceptor

EC 1.21.3.1 isopenicillin-N synthase
EC 1.21.3.2 columbamine oxidase
EC 1.21.3.3 reticuline oxidase
EC 1.21.3.4 sulochrin oxidase [(+)-bisdechlorogeodin-forming]
EC 1.21.3.5 sulochrin oxidase [(-)-bisdechlorogeodin-forming]
EC 1.21.3.6 aureusidin synthase
EC 1.21.4 With a disulfide as acceptor
EC 1.21.4.1 D-proline reductase (dithiol)
EC 1.21.4.2 glycine reductase
EC 1.21.4.3 sarcosine reductase
EC 1.21.4.4 betaine reductase
EC 1.21.99 With other acceptors
EC 1.21.99.1 β-cyclopiazonate dehydrogenase
EC 1.97 Other oxidoreductases

EC 1.97.1.1 chlorate reductase
EC 1.97.1.2 pyrogallol hydroxyltransferase
EC 1.97.1.3 sulfur reductase
EC 1.97.1.4 [formate-C-acetyltransferase]-activating enzyme
EC 1.97.1.5 now EC 1.20.4.1
EC 1.97.1.6 now EC 1.20.99.1
EC 1.97.1.7 now EC 1.20.4.2
EC 1.97.1.8 tetrachloroethene reductive dehalogenase
EC 1.97.1.9 selenate reductase
EC 1.97.1.10 thyroxine 5'-deiodinase
EC 1.97.1.11 thyroxine 5-deiodinase

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