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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

1.5 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

1.12.1 With NAD⁺ or NADP⁺ as acceptor

1.12.2 With a cytochrome as acceptor

1.12.5 With a quinone or similar compound as acceptor

1.12.7 With an iron-sulfur protein as acceptor

1.12.98 With other, known, physiological acceptors

1.12.99 With unknown physiological acceptors

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

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

1.97.1.1 chlorate reductase

1.97.1.2 pyrogallol hydroxytransferase

1.97.1.3 sulfur reductase

1.97.1.4 [formate-C-acetyltransferase]-activating enzyme

1.97.1.5 created 2000 deleted 2001

1.97.1.6 created 2000 deleted 2001

1.97.1.7 created 2000, deleted 2001

1.97.1.8 tetrachloroethene reductive dehalogenase

1.97.1.9 selenate reductase

1.97.1.10 thyroxine 5′-deiodinase

1.97.1.11 thyroxine 5-deiodinase

1.97.1.12 photosystem I

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)