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EC Tree

1 Oxidoreductases

1.1 Acting on the CH-OH group of donors

1.1.1 With NAD⁺ or NADP⁺ as acceptor

1.1.2 With a cytochrome as acceptor

1.1.3 With oxygen as acceptor

1.1.4 With a disulfide as acceptor

1.1.5 With a quinone or similar compound as acceptor

1.1.7 With an iron-sulfur protein as acceptor

1.1.9 With a copper protein as acceptor

1.1.98 With other, known, physiological acceptors

1.1.98.1 alcohol dehydrogenase (azurin)

1.1.98.2 glucose-6-phosphate dehydrogenase (coenzyme-F₄₂₀)

1.1.98.3 decaprenylphospho-β-D-ribofuranose 2-dehydrogenase

1.1.98.4 F₄₂₀H₂:quinone oxidoreductase

1.1.98.5 secondary-alcohol dehydrogenase (coenzyme-F₄₂₀)

1.1.98.6 ribonucleoside-triphosphate reductase (formate)

1.1.98.7 serine-type anaerobic sulfatase-maturating enzyme

1.1.99 With unknown physiological acceptors

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)

1.14 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)

4.1 Carbon-carbon lyases

4.2 Carbon-oxygen lyases

4.2.1 Hydro-lyases

4.2.2 Acting on polysaccharides

4.2.3 Acting on phosphates

4.2.99 Other carbon-oxygen lyases

4.2.99.1 created 1961, deleted 1972

4.2.99.2 created 1961, deleted 2000

4.2.99.3 created 1965, deleted 1972

4.2.99.4 created 1965, deleted 1972

4.2.99.5 created 1965, deleted 1972

4.2.99.6 created 1965, deleted 1972

4.2.99.7 created 1972, deleted 2000

4.2.99.8 created 1972, modified 1976, modified 1990, deleted 2002

4.2.99.9 created 1972, deleted 2002

4.2.99.10 created 1972, deleted 2002

4.2.99.11 created 1972, deleted 2000

4.2.99.12 carboxymethyloxysuccinate lyase

4.2.99.13 created 1984, deleted 2002

4.2.99.14 created 1989 (EC 4.2.99.17 incorporated 1992), deleted 2002

4.2.99.15 created 1989, deleted 2002

4.2.99.16 created 1990, deleted 2002

4.2.99.17 created 1992, deleted 1992

4.2.99.18 DNA-(apurinic or apyrimidinic site) lyase

4.2.99.19 created 2001, deleted 2005

4.2.99.20 2-succinyl-6-hydroxy-2,4-cyclohexadiene-1-carboxylate synthase

4.2.99.21 isochorismate lyase

4.2.99.22 tuliposide A-converting enzyme

4.2.99.23 tuliposide B-converting enzyme

4.2.99.24 thebaine synthase

4.3 Carbon-nitrogen lyases

4.4 Carbon-sulfur lyases

4.5 Carbon-halide lyases

4.6 Phosphorus-oxygen lyases

4.7 carbon-phosphorus lyases

4.8 Nitrogen-oxygen lyases

4.98 ATP-independent chelatases

4.99 Other lyases

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Release 2023.1 (January 2023)