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Enzymes
  Enzyme classes:
  EC 1: Oxidoreductases
    EC 1.1
    EC 1.2
    EC 1.3
    EC 1.4
    EC 1.5
    EC 1.6
    EC 1.7
    EC 1.8
    EC 1.9
    EC 1.10
    EC 1.11
    EC 1.12
      EC 1.12.1
      EC 1.12.2
      EC 1.12.5
      EC 1.12.7
      EC 1.12.98
      EC 1.12.99
    EC 1.13
    EC 1.14
    EC 1.15
    EC 1.16
    EC 1.17
    EC 1.18
    EC 1.19
    EC 1.20
    EC 1.21
    EC 1.97
    EC 1.98
    EC 1.99
  EC 2: Transferases
  EC 3: Hydrolases
  EC 4: Lyases
  EC 5: Isomerases
  EC 6: Ligases
  General information:
  Catalytic mechanism
  Enzyme kinetics
  Inhibitors
  Enzymes in industry

EC 1.12. Oxidoreductases that act on hydrogen

EC 1.12 subclass definition

The EC 1.12 subclass contains dehydrogenases that acts as a donor for the reduction of hydrogen (H⁺ to H₂. Further classification is based on acceptors involved in catalysis, but the classification of this sublass should be revised in future.

Further classification of EC 1.12 subclass

This classification is based on acceptors involved in catalysis.

EC 1.12.1 - Acceptors are NAD⁺ or NADP⁺
EC 1.12.2 - Acceptor is cytochrome
EC 1.12.5 - Acceptor is quinone or similar compound
EC 1.12.7 - Acceptor is iron-sulphur protein
EC 1.12.98 - Other known acceptors
EC 1.12.99 - All other acceptors, also reserved for non classified enzymes