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1 Oxidoreductases
(9574 organisms)
1.1 Acting on the CH-OH group of donors
(6931 organisms)
1.2 Acting on the aldehyde or oxo group of donors
(1228 organisms)
1.3 Acting on the CH-CH group of donors
(1041 organisms)
1.4 Acting on the CH-NH
2
group of donors
(1047 organisms)
1.5 Acting on the CH-NH group of donors
(744 organisms)
1.6 Acting on NADH or NADPH
(338 organisms)
1.7 Acting on other nitrogenous compounds as donors
(568 organisms)
1.8 Acting on a sulfur group of donors
(749 organisms)
1.8.1 With NAD
+
or NADP
+
as acceptor
(315 organisms)
1.8.2 With a cytochrome as acceptor
(51 organisms)
1.8.3 With oxygen as acceptor
(109 organisms)
1.8.4 With a disulfide as acceptor
(204 organisms)
1.8.5 With a quinone or similar compound as acceptor
(89 organisms)
1.8.6 With a nitrogenous group as acceptor (deleted sub-subclass)
1.8.7 With an iron-sulfur protein as acceptor
(40 organisms)
1.8.98 With other, known, physiological acceptors
(39 organisms)
1.8.99 With unknown physiological acceptors
(128 organisms)
1.9 Acting on a heme group of donors
(185 organisms)
1.10 Acting on diphenols and related substances as donors
(444 organisms)
1.11 Acting on a peroxide as acceptor
(797 organisms)
1.11.1 Peroxidases
(781 organisms)
1.11.2 Peroxygenases
(36 organisms)
1.12 Acting on hydrogen as donor
(260 organisms)
1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)
(863 organisms)
1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen
(2386 organisms)
1.15 Acting on superoxide as acceptor
(381 organisms)
1.16 Oxidizing metal ions
(234 organisms)
1.16.1 With NAD
+
or NADP
+
as acceptor
(172 organisms)
1.16.3 With oxygen as acceptor
(73 organisms)
1.16.5 With a quinone or similar compound as acceptor
1.16.8 With a flavin as acceptor
1.16.9 With a copper protein as acceptor
(3 organisms)
1.16.98 With other, known, physiological acceptors
1.17 Acting on CH or CH
2
groups
(402 organisms)
1.18 Acting on iron-sulfur proteins as donors
(198 organisms)
1.19 Acting on reduced flavodoxin as donor
(21 organisms)
1.20 Acting on phosphorus or arsenic in donors
(106 organisms)
1.21 Catalysing the reaction X-H + Y-H = X-Y
(151 organisms)
1.22 Acting on halogen in donors
1.23 Reducing C-O-C group as acceptor
(32 organisms)
1.97 Other oxidoreductases
(134 organisms)
1.98 Enzymes using H
2
as reductant (deleted subclass)
1.99 Other enzymes using O
2
as oxidant (deleted subclass)
2 Transferases
(6645 organisms)
3 Hydrolases
(11217 organisms)
4 Lyases
(5132 organisms)
5 Isomerases
(2096 organisms)
6 Ligases
(1554 organisms)
6.1 Forming carbon-oxygen bonds
(379 organisms)
6.2 Forming carbon-sulfur bonds
(427 organisms)
6.3 Forming carbon-nitrogen bonds
(798 organisms)
6.4 Forming carbon-carbon bonds
(203 organisms)
6.5 Forming phosphoric-ester bonds
(241 organisms)
6.6 Forming nitrogenmetal bonds
(26 organisms)
7 Translocases
(1092 organisms)