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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

1.5.1 With NAD⁺ or NADP⁺ as acceptor

1.5.3 With oxygen as acceptor

1.5.4 With a disulfide as acceptor

1.5.5 With a quinone or similar compound as acceptor

1.5.7 With an iron-sulfur protein as acceptor

1.5.8 With a flavin or flavoprotein as acceptor

1.5.98 With other, known, physiological acceptors

1.5.99 With unknown physiological acceptors

1.5.99.1 sarcosine dehydrogenase

1.5.99.2 dimethylglycine dehydrogenase

1.5.99.3 L-pipecolate dehydrogenase

1.5.99.4 nicotine dehydrogenase

1.5.99.5 methylglutamate dehydrogenase

1.5.99.6 spermidine dehydrogenase

1.5.99.7 created 1976, deleted 2002

1.5.99.8 proline dehydrogenase

1.5.99.9 methylenetetrahydromethanopterin dehydrogenase

1.5.99.10 created 1999, deleted 2002

1.5.99.11 5,10-methylenetetrahydromethanopterin reductase

1.5.99.12 cytokinin dehydrogenase

1.5.99.13 D-proline dehydrogenase

1.5.99.14 6-hydroxypseudooxynicotine dehydrogenase

1.5.99.15 dihydromethanopterin reductase (acceptor)

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

1.15 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

1.21.1 With NAD⁺ or NADP⁺ as acceptor

1.21.3 With oxygen as acceptor

1.21.4 With a disulfide as acceptor

1.21.98 With other, known, physiological acceptors

1.21.99 With unknown physiological acceptors

1.22 Acting on halogen in donors

1.23 Reducing C-O-C group as acceptor

1.97 Other oxidoreductases

1.98 Enzymes using H₂ as reductant (deleted subclass)

1.99 Other enzymes using O₂ as oxidant (deleted subclass)

3.1 Acting on ester bonds

3.2 Glycosylases

3.3 Acting on ether bonds

3.4 Acting on peptide bonds (peptidases)

3.5 Acting on carbon-nitrogen bonds, other than peptide bonds

3.6 Acting on acid anhydrides

3.7 Acting on carbon-carbon bonds

3.8 Acting on halide bonds

3.9 Acting on phosphorus-nitrogen bonds

3.10 Acting on sulfur-nitrogen bonds

3.10.1 Acting on sulfur-nitrogen bonds (only sub-subclass identified to date)

3.11 Acting on carbon-phosphorus bonds

3.12 Acting on sulfur-sulfur bonds

3.13 Acting on carbon-sulfur bonds

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Release 2023.1 (January 2023)