Nomenclature Committee of the International Union of Biochemistry and Molecular Biology (NC-IUBMB)

Enzyme Nomenclature. Recommendations

https://iubmb.qmul.ac.uk/enzyme/EC1/

EC 1 Oxidoreductases

Contents

1. List of Accepted names EC 1 linked to a separate file for each enzyme. EC 1.1 to EC 1.3 and EC 1.4 to EC 1.99

2. List of Accepted names EC 1 linked to files with up to 50 enzymes. EC 1.1 to EC 1.3 and EC 1.4 to EC 1.99

EC 1 Oxidoreductases

Number Name Enzyme file type

EC 1.1 Acting on the CH-OH group of donors separate up to 50

EC 1.1.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.1.2 With a cytochrome as acceptor separate up to 50

EC 1.1.3 With oxygen as acceptor separate up to 50

EC 1.1.4 With a disulfide as acceptor separate up to 50

EC 1.1.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.1.9 With a copper protein as acceptor separate up to 50

EC 1.1.98 With other, known, physiological acceptors separate up to 50

EC 1.1.99 With unknown physiological acceptors separate up to 50

EC 1.2 Acting on the aldehyde or oxo group of donors separate up to 50

EC 1.2.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.2.2 With a cytochrome as acceptor separate up to 50

EC 1.2.3 With oxygen as acceptor separate up to 50

EC 1.2.4 With a disulfide as acceptor separate up to 50

EC 1.2.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.2.7 With an iron-sulfur protein acceptor separate up to 50

EC 1.2.98 With other, known, physiological acceptors separate up to 50

EC 1.2.99 With unknown physiological acceptors separate up to 50

EC 1.3 Acting on the CH-CH group of donors separate up to 50

EC 1.3.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.3.2 With a cytochrome as acceptor separate up to 50

EC 1.3.3 With oxygen as acceptor separate up to 50

EC 1.3.4 With oxygen as acceptor separate up to 50

EC 1.3.5 With a quinone or related compound as acceptor separate up to 50

EC 1.3.7 With an iron-sulfur protein as acceptor separate up to 50

EC 1.3.8 With a flavin as acceptor separate up to 50

EC 1.3.98 With other, known, physiological acceptors separate up to 50

EC 1.3.99 With unknown physiological acceptors separate up to 50

EC 1.4 Acting on the CH-NH₂ group of donors separate up to 50

EC 1.4.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.4.2 With a cytochrome as acceptor separate up to 50

EC 1.4.3 With oxygen as acceptor separate up to 50

EC 1.4.4 With a disulfide as acceptor separate up to 50

EC 1.4.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.4.7 With an iron-sulfur protein as acceptor separate up to 50

EC 1.4.9 With a copper protein as acceptor separate up to 50

EC 1.4.98 With other, known, physiological acceptors separate up to 50

EC 1.4.99 With unknown physiological acceptors separate up to 50

EC 1.5 Acting on the CH-NH group of donors separate up to 50

EC 1.5.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.5.3 With oxygen as acceptor separate up to 50

EC 1.5.4 With a disulfide as acceptor separate up to 50

EC 1.5.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.5.8 With a flavin as acceptor separate up to 50

EC 1.5.98 With other, known, physiological acceptors separate up to 50

EC 1.5.99 With unknown physiological acceptors separate up to 50

EC 1.6 Acting on NADH or NADPH separate up to 50

EC 1.6.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.6.2 With a heme protein as acceptor separate up to 50

EC 1.6.3 With oxygen as acceptor separate up to 50

EC 1.6.4 With a disulfide as acceptor separate up to 50

EC 1.6.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.6.6 With a nitrogenous group as acceptor separate up to 50

EC 1.6.7 With an iron-sulfur protein as acceptor separate up to 50

EC 1.6.8 With a flavin as acceptor separate up to 50

EC 1.6.99 With unknown physiological acceptors separate up to 50

EC 1.7 Acting on other nitrogenous compounds as donors separate up to 50

EC 1.7.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.7.2 With a cytochrome as acceptor separate up to 50

EC 1.7.3 With oxygen as acceptor separate up to 50

EC 1.7.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.7.6 With a nitrogenous group as acceptor separate up to 50

EC 1.7.7 With an iron-sulfur protein as acceptor separate up to 50

EC 1.7.99 With unknown physiological acceptors separate up to 50

EC 1.8 Acting on a sulfur group of donors separate up to 50

EC 1.8.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.8.2 With a cytochrome as acceptor separate up to 50

EC 1.8.3 With oxygen as acceptor separate up to 50

EC 1.8.4 With a disulfide as acceptor separate up to 50

EC 1.8.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.8.7 With an iron-sulfur protein as acceptor separate up to 50

EC 1.8.98 With other, known, physiological acceptors separate up to 50

EC 1.8.99 With unknown physiological acceptors separate up to 50

EC 1.9 Acting on a heme group of donors separate up to 50

EC 1.9.3 With oxygen as acceptor separate up to 50

EC 1.9.6 With a nitrogenous group as acceptor separate up to 50

EC 1.9.98 With other, known, physiological acceptors separate up to 50

EC 1.9.99 With unknown physiological acceptors separate up to 50

EC 1.10 Acting on diphenols and related substances as donors separate up to 50

EC 1.10.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.10.2 With a cytochrome as acceptor separate up to 50

EC 1.10.3 With oxygen as acceptor separate up to 50

EC 1.10.5 With a quinone or related compound as acceptor separate up to 50

EC 1.10.9 With a copper protein as acceptor separate up to 50

EC 1.10.99 With unknown physiological acceptors separate up to 50

EC 1.11 Acting on a peroxide as acceptor separate up to 50

EC 1.11.1 Peroxidases separate up to 50

EC 1.11.2 With H₂O₂ as acceptor, one oxygen atom of which is incorporated into the product separate up to 50

EC 1.12 Acting on hydrogen as donor separate up to 50

EC 1.12.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.12.2 With a cytochrome as acceptor separate up to 50

EC 1.12.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.12.7 With an iron-sulfur protein as acceptor separate up to 50

EC 1.12.98 With other, known, physiological acceptors separate up to 50

EC 1.12.99 With unknown physiological acceptors separate up to 50

EC 1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases) separate up to 50

EC 1.13.11 With incorporation of two atoms of oxygen separate up to 50

EC 1.13.12 With incorporation of one atom of oxygen (internal monooxygenases or
internal mixed function oxidases) separate up to 50

EC 1.13.99 Miscellaneous separate up to 50

EC 1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen separate up to 50

EC 1.14.11 With 2-oxoglutarate as one donor, and incorporation of one atom each of oxygen into both donors separate up to 50

EC 1.14.12 With NADH or NADPH as one donor, and incorporation of two atoms of oxygen into one donor separate up to 50

EC 1.14.13 With NADH or NADPH as one donor, and incorporation of one atom of oxygen separate up to 50

EC 1.14.14 With reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen separate up to 50

EC 1.14.15 With reduced iron-sulfur protein as one donor, and incorporation of one atom of oxygen separate up to 50

EC 1.14.16 With reduced pteridine as one donor, and incorporation of one atom of oxygen separate up to 50

EC 1.14.17 With reduced ascorbate as one donor, and incorporation of one atom of oxygen separate up to 50

EC 1.14.18 With another compound as one donor, and incorporation of one atom of oxygen separate up to 50

EC 1.14.19 With oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water separate up to 50

EC 1.14.20 With 2-oxoglutarate as one donor, and the other dehydrogenated separate up to 50

EC 1.14.21 With NADH or NADPH as one donor, and the other dehydrogenated separate up to 50

EC 1.14.99 Miscellaneous separate up to 50

EC 1.15 Acting on superoxide as acceptor separate up to 50

EC 1.16 Oxidizing metal ions separate up to 50

EC 1.16.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.16.3 With oxygen as acceptor separate up to 50

EC 1.16.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.16.8 With flavin as acceptor separate up to 50

EC 1.16.9 With a copper protein as acceptor separate up to 50

EC 1.16.98 With other, known, physiological acceptors separate up to 50

EC 1.17 Acting on CH or CH₂ groups separate up to 50

EC 1.17.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.17.2 With a cytochrome as acceptor separate up to 50

EC 1.17.3 With oxygen as acceptor separate up to 50

EC 1.17.4 With a disulfide as acceptor separate up to 50

EC 1.17.5 With a quinone or similar compound as acceptor separate up to 50

EC 1.17.7 With an iron-sulfur protein as acceptor separate up to 50

EC 1.17.8 With a flavin as acceptors separate up to 50

EC 1.17.98 With other, known, physiological acceptors separate up to 50

EC 1.17.99 With unknown physiological acceptors separate up to 50

EC 1.18 Acting on iron-sulfur proteins as donors separate up to 50

EC 1.18.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.18.3 With H⁺ as acceptor (now EC 1.18.99) separate up to 50

EC 1.18.6 With dinitrogen as acceptor separate up to 50

EC 1.18.96 With other, known, physiological acceptors separate up to 50

EC 1.18.99 With H⁺ as acceptor separate up to 50

EC 1.19 Acting on reduced flavodoxin as donor separate up to 50

EC 1.19.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.19.6 With dinitrogen as acceptor separate up to 50

EC 1.20 Acting on phosphorus or arsenic in donors separate up to 50

EC 1.20.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.20.2 With a cytochrome as acceptor separate up to 50

EC 1.20.4 With disulfide as acceptor separate up to 50

EC 1.20.9 With a copper protein as acceptor separate up to 50

EC 1.20.98 With other, known, physiological acceptors separate up to 50

EC 1.20.99 With unknown physiological acceptors separate up to 50

EC 1.21 Acting on the reaction X-H + Y-H = X-Y separate up to 50

EC 1.21.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.21.3 With oxygen as acceptor separate up to 50

EC 1.21.4 With a disulfide as acceptor separate up to 50

EC 1.21.98 With other, known, physiological acceptors separate up to 50

EC 1.21.99 With unknown physiological acceptors separate up to 50

EC 1.22 Acting on halogen in donors separate up to 50

EC 1.22.1 With NAD⁺ or NADP⁺ as acceptor separate up to 50

EC 1.23 Reducing C-O-C group as acceptor separate up to 50

EC 1.23.1 With NADH or NADPH as donor separate up to 50

EC 1.23.5 With a quinone or related compound as acceptor separate up to 50

EC 1.97 Other oxidoreductases separate up to 50

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Number	Name	Enzyme file type
EC 1.1	Acting on the CH-OH group of donors	separate	up to 50
EC 1.1.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.1.2	With a cytochrome as acceptor	separate	up to 50
EC 1.1.3	With oxygen as acceptor	separate	up to 50
EC 1.1.4	With a disulfide as acceptor	separate	up to 50
EC 1.1.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.1.9	With a copper protein as acceptor	separate	up to 50
EC 1.1.98	With other, known, physiological acceptors	separate	up to 50
EC 1.1.99	With unknown physiological acceptors	separate	up to 50
EC 1.2	Acting on the aldehyde or oxo group of donors	separate	up to 50
EC 1.2.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.2.2	With a cytochrome as acceptor	separate	up to 50
EC 1.2.3	With oxygen as acceptor	separate	up to 50
EC 1.2.4	With a disulfide as acceptor	separate	up to 50
EC 1.2.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.2.7	With an iron-sulfur protein acceptor	separate	up to 50
EC 1.2.98	With other, known, physiological acceptors	separate	up to 50
EC 1.2.99	With unknown physiological acceptors	separate	up to 50
EC 1.3	Acting on the CH-CH group of donors	separate	up to 50
EC 1.3.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.3.2	With a cytochrome as acceptor	separate	up to 50
EC 1.3.3	With oxygen as acceptor	separate	up to 50
EC 1.3.4	With oxygen as acceptor	separate	up to 50
EC 1.3.5	With a quinone or related compound as acceptor	separate	up to 50
EC 1.3.7	With an iron-sulfur protein as acceptor	separate	up to 50
EC 1.3.8	With a flavin as acceptor	separate	up to 50
EC 1.3.98	With other, known, physiological acceptors	separate	up to 50
EC 1.3.99	With unknown physiological acceptors	separate	up to 50
EC 1.4	Acting on the CH-NH₂ group of donors	separate	up to 50
EC 1.4.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.4.2	With a cytochrome as acceptor	separate	up to 50
EC 1.4.3	With oxygen as acceptor	separate	up to 50
EC 1.4.4	With a disulfide as acceptor	separate	up to 50
EC 1.4.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.4.7	With an iron-sulfur protein as acceptor	separate	up to 50
EC 1.4.9	With a copper protein as acceptor	separate	up to 50
EC 1.4.98	With other, known, physiological acceptors	separate	up to 50
EC 1.4.99	With unknown physiological acceptors	separate	up to 50
EC 1.5	Acting on the CH-NH group of donors	separate	up to 50
EC 1.5.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.5.3	With oxygen as acceptor	separate	up to 50
EC 1.5.4	With a disulfide as acceptor	separate	up to 50
EC 1.5.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.5.8	With a flavin as acceptor	separate	up to 50
EC 1.5.98	With other, known, physiological acceptors	separate	up to 50
EC 1.5.99	With unknown physiological acceptors	separate	up to 50
EC 1.6	Acting on NADH or NADPH	separate	up to 50
EC 1.6.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.6.2	With a heme protein as acceptor	separate	up to 50
EC 1.6.3	With oxygen as acceptor	separate	up to 50
EC 1.6.4	With a disulfide as acceptor	separate	up to 50
EC 1.6.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.6.6	With a nitrogenous group as acceptor	separate	up to 50
EC 1.6.7	With an iron-sulfur protein as acceptor	separate	up to 50
EC 1.6.8	With a flavin as acceptor	separate	up to 50
EC 1.6.99	With unknown physiological acceptors	separate	up to 50
EC 1.7	Acting on other nitrogenous compounds as donors	separate	up to 50
EC 1.7.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.7.2	With a cytochrome as acceptor	separate	up to 50
EC 1.7.3	With oxygen as acceptor	separate	up to 50
EC 1.7.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.7.6	With a nitrogenous group as acceptor	separate	up to 50
EC 1.7.7	With an iron-sulfur protein as acceptor	separate	up to 50
EC 1.7.99	With unknown physiological acceptors	separate	up to 50
EC 1.8	Acting on a sulfur group of donors	separate	up to 50
EC 1.8.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.8.2	With a cytochrome as acceptor	separate	up to 50
EC 1.8.3	With oxygen as acceptor	separate	up to 50
EC 1.8.4	With a disulfide as acceptor	separate	up to 50
EC 1.8.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.8.7	With an iron-sulfur protein as acceptor	separate	up to 50
EC 1.8.98	With other, known, physiological acceptors	separate	up to 50
EC 1.8.99	With unknown physiological acceptors	separate	up to 50
EC 1.9	Acting on a heme group of donors	separate	up to 50
EC 1.9.3	With oxygen as acceptor	separate	up to 50
EC 1.9.6	With a nitrogenous group as acceptor	separate	up to 50
EC 1.9.98	With other, known, physiological acceptors	separate	up to 50
EC 1.9.99	With unknown physiological acceptors	separate	up to 50
EC 1.10	Acting on diphenols and related substances as donors	separate	up to 50
EC 1.10.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.10.2	With a cytochrome as acceptor	separate	up to 50
EC 1.10.3	With oxygen as acceptor	separate	up to 50
EC 1.10.5	With a quinone or related compound as acceptor	separate	up to 50
EC 1.10.9	With a copper protein as acceptor	separate	up to 50
EC 1.10.99	With unknown physiological acceptors	separate	up to 50
EC 1.11	Acting on a peroxide as acceptor	separate	up to 50
EC 1.11.1	Peroxidases	separate	up to 50
EC 1.11.2	With H₂O₂ as acceptor, one oxygen atom of which is incorporated into the product	separate	up to 50
EC 1.12	Acting on hydrogen as donor	separate	up to 50
EC 1.12.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.12.2	With a cytochrome as acceptor	separate	up to 50
EC 1.12.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.12.7	With an iron-sulfur protein as acceptor	separate	up to 50
EC 1.12.98	With other, known, physiological acceptors	separate	up to 50
EC 1.12.99	With unknown physiological acceptors	separate	up to 50
EC 1.13	Acting on single donors with incorporation of molecular oxygen (oxygenases)	separate	up to 50
EC 1.13.11	With incorporation of two atoms of oxygen	separate	up to 50
EC 1.13.12	With incorporation of one atom of oxygen (internal monooxygenases or internal mixed function oxidases)	separate	up to 50
EC 1.13.99	Miscellaneous	separate	up to 50
EC 1.14	Acting on paired donors, with incorporation or reduction of molecular oxygen	separate	up to 50
EC 1.14.11	With 2-oxoglutarate as one donor, and incorporation of one atom each of oxygen into both donors	separate	up to 50
EC 1.14.12	With NADH or NADPH as one donor, and incorporation of two atoms of oxygen into one donor	separate	up to 50
EC 1.14.13	With NADH or NADPH as one donor, and incorporation of one atom of oxygen	separate	up to 50
EC 1.14.14	With reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen	separate	up to 50
EC 1.14.15	With reduced iron-sulfur protein as one donor, and incorporation of one atom of oxygen	separate	up to 50
EC 1.14.16	With reduced pteridine as one donor, and incorporation of one atom of oxygen	separate	up to 50
EC 1.14.17	With reduced ascorbate as one donor, and incorporation of one atom of oxygen	separate	up to 50
EC 1.14.18	With another compound as one donor, and incorporation of one atom of oxygen	separate	up to 50
EC 1.14.19	With oxidation of a pair of donors resulting in the reduction of molecular oxygen to two molecules of water	separate	up to 50
EC 1.14.20	With 2-oxoglutarate as one donor, and the other dehydrogenated	separate	up to 50
EC 1.14.21	With NADH or NADPH as one donor, and the other dehydrogenated	separate	up to 50
EC 1.14.99	Miscellaneous	separate	up to 50
EC 1.15	Acting on superoxide as acceptor	separate	up to 50
EC 1.16	Oxidizing metal ions	separate	up to 50
EC 1.16.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.16.3	With oxygen as acceptor	separate	up to 50
EC 1.16.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.16.8	With flavin as acceptor	separate	up to 50
EC 1.16.9	With a copper protein as acceptor	separate	up to 50
EC 1.16.98	With other, known, physiological acceptors	separate	up to 50
EC 1.17	Acting on CH or CH₂ groups	separate	up to 50
EC 1.17.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.17.2	With a cytochrome as acceptor	separate	up to 50
EC 1.17.3	With oxygen as acceptor	separate	up to 50
EC 1.17.4	With a disulfide as acceptor	separate	up to 50
EC 1.17.5	With a quinone or similar compound as acceptor	separate	up to 50
EC 1.17.7	With an iron-sulfur protein as acceptor	separate	up to 50
EC 1.17.8	With a flavin as acceptors	separate	up to 50
EC 1.17.98	With other, known, physiological acceptors	separate	up to 50
EC 1.17.99	With unknown physiological acceptors	separate	up to 50
EC 1.18	Acting on iron-sulfur proteins as donors	separate	up to 50
EC 1.18.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.18.3	With H⁺ as acceptor (now EC 1.18.99)	separate	up to 50
EC 1.18.6	With dinitrogen as acceptor	separate	up to 50
EC 1.18.96	With other, known, physiological acceptors	separate	up to 50
EC 1.18.99	With H⁺ as acceptor	separate	up to 50
EC 1.19	Acting on reduced flavodoxin as donor	separate	up to 50
EC 1.19.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.19.6	With dinitrogen as acceptor	separate	up to 50
EC 1.20	Acting on phosphorus or arsenic in donors	separate	up to 50
EC 1.20.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.20.2	With a cytochrome as acceptor	separate	up to 50
EC 1.20.4	With disulfide as acceptor	separate	up to 50
EC 1.20.9	With a copper protein as acceptor	separate	up to 50
EC 1.20.98	With other, known, physiological acceptors	separate	up to 50
EC 1.20.99	With unknown physiological acceptors	separate	up to 50
EC 1.21	Acting on the reaction X-H + Y-H = X-Y	separate	up to 50
EC 1.21.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.21.3	With oxygen as acceptor	separate	up to 50
EC 1.21.4	With a disulfide as acceptor	separate	up to 50
EC 1.21.98	With other, known, physiological acceptors	separate	up to 50
EC 1.21.99	With unknown physiological acceptors	separate	up to 50
EC 1.22	Acting on halogen in donors	separate	up to 50
EC 1.22.1	With NAD⁺ or NADP⁺ as acceptor	separate	up to 50
EC 1.23	Reducing C-O-C group as acceptor	separate	up to 50
EC 1.23.1	With NADH or NADPH as donor	separate	up to 50
EC 1.23.5	With a quinone or related compound as acceptor	separate	up to 50
EC 1.97	Other oxidoreductases	separate	up to 50