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EC Tree

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

1.4.1 With NAD⁺ or NADP⁺ as acceptor

1.4.1.1 alanine dehydrogenase

1.4.1.2 glutamate dehydrogenase

1.4.1.3 glutamate dehydrogenase [NAD(P)⁺]

1.4.1.4 glutamate dehydrogenase (NADP⁺)

1.4.1.5 L-amino-acid dehydrogenase

1.4.1.6 created 1961, deleted 1982

1.4.1.7 serine 2-dehydrogenase

1.4.1.8 valine dehydrogenase (NADP⁺)

1.4.1.9 leucine dehydrogenase

1.4.1.10 glycine dehydrogenase

1.4.1.11 L-erythro-3,5-diaminohexanoate dehydrogenase

1.4.1.12 2,4-diaminopentanoate dehydrogenase

1.4.1.13 glutamate synthase (NADPH)

1.4.1.14 glutamate synthase (NADH)

1.4.1.15 lysine dehydrogenase

1.4.1.16 diaminopimelate dehydrogenase

1.4.1.17 N-methylalanine dehydrogenase

1.4.1.18 lysine 6-dehydrogenase

1.4.1.19 tryptophan dehydrogenase

1.4.1.20 phenylalanine dehydrogenase

1.4.1.21 aspartate dehydrogenase

1.4.1.22 ornithine cyclodeaminase

1.4.1.23 valine dehydrogenase (NAD⁺)

1.4.1.24 3-dehydroquinate synthase II

1.4.1.25 L-arginine dehydrogenase

1.4.1.26 2,4-diaminopentanoate dehydrogenase (NAD⁺)

1.4.1.27 glycine cleavage system

1.4.1.28 secondary-alkyl amine dehydrogenase [NAD(P)⁺]

1.4.2 With a cytochrome as acceptor

1.4.3 With oxygen as acceptor

1.4.4 With a disulfide as acceptor

1.4.5 With a quinone or other compound as acceptor

1.4.7 With an iron-sulfur protein as acceptor

1.4.9 With a copper protein as acceptor

1.4.98. undefined

1.4.99 With unknown physiological acceptors

1.5 Acting on the CH-NH group of donors

1.6 Acting on NADH or NADPH

1.6.1 With NAD⁺ or NADP⁺ as acceptor

1.6.2 With a heme protein as acceptor

1.6.3 With oxygen as acceptor

1.6.4 With a disulfide as acceptor (deleted sub-subclass)

1.6.5 With a quinone or similar compound as acceptor

1.6.6 With a nitrogenous group as acceptor

1.6.7 With an iron-sulfur protein as acceptor (deleted sub-subclass)

1.6.8 With a flavin as acceptor (deleted sub-subclass)

1.6.99 With unknown physiological acceptors

1.7 Acting on other nitrogenous compounds as donors

1.7.1 With NAD⁺ or NADP⁺ as acceptor

1.7.1.1 nitrate reductase (NADH)

1.7.1.2 nitrate reductase [NAD(P)H]

1.7.1.3 nitrate reductase (NADPH)

1.7.1.4 nitrite reductase [NAD(P)H]

1.7.1.5 hyponitrite reductase

1.7.1.6 azobenzene reductase

1.7.1.7 GMP reductase

1.7.1.8 created 2002, deleted 2002

1.7.1.9 nitroquinoline-N-oxide reductase

1.7.1.10 hydroxylamine reductase (NADH)

1.7.1.11 4-(dimethylamino)phenylazoxybenzene reductase

1.7.1.12 N-hydroxy-2-acetamidofluorene reductase

1.7.1.13 preQ₁ synthase

1.7.1.14 nitric oxide reductase [NAD(P)⁺, nitrous oxide-forming]

1.7.1.15 nitrite reductase (NADH)

1.7.1.16 nitrobenzene nitroreductase

1.7.1.17 FMN-dependent NADH-azoreductase

1.7.2 With a cytochrome as acceptor

1.7.3 With oxygen as acceptor

1.7.5 With a quinone or similar compound as acceptor

1.7.6 With a nitrogenous group as acceptor

1.7.7 With an iron-sulfur protein as acceptor

1.7.9 With a copper protein as acceptor

1.7.99 With unknown physiological acceptors

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

1.15 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

1.22 Acting on halogen in donors

1.23 Reducing C-O-C group as acceptor

1.97 Other oxidoreductases

1.97.1 Sole sub-subclass for oxidoreductases that do not belong in the other subclasses

1.98 Enzymes using H₂ as reductant (deleted subclass)

1.99 Other enzymes using O₂ as oxidant (deleted subclass)

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Release 2023.1 (January 2023)