EC 1. Oxidoreductases

EC 1.12 Acting on hydrogen as donor

This subclass contains hydrogenases other than those that use iron-sulfur compounds as donor (EC 1.18) for the reduction of H+ to H2. Sub-subclasses are based on the acceptor: NAD+ or NADP+ (EC 1.12.1), a cytochrome (EC 1.12.2), a quinone or similar compound (EC 1.12.5), an iron-sulfur protein (EC 1.12.7), other, known, acceptors (EC 1.12.9), or some other acceptor (EC 1.12.99).

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