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Enzymes
  Enzyme classes:
  EC 1: Oxidoreductases
  EC 2: Transferases
  EC 3: Hydrolases
  EC 4: Lyases
    EC 4.1
    EC 4.2
      EC 4.2.1
      EC 4.2.2
      EC 4.2.3
      EC 4.2.99
    EC 4.3
    EC 4.4
    EC 4.5
    EC 4.6
    EC 4.99
  EC 5: Isomerases
  EC 6: Ligases
  General information:
  Catalytic mechanism
  Enzyme kinetics
  Inhibitors
  Enzymes in industry

EC 4.2 Carbon- oxygen lyases

EC 4.2 subclass definition

The EC 4.2 subclass contains lyases that catalyze cleavage of carbon-oxygen bonds. Further classification is based on oxygen containing group type that have been cleaved during the catalytic act.

Further classification of EC 4.2 subclass

This classification is based on oxygen containing group type removed during cleavage. In this sub-subclass many lyases are clasisfies as syntases.

EC 4.2.1 - Hydro-Lyases (dehydratases)
EC 4.2.2 - Lyases acting on polysaccharides
EC 4.2.3 - Lyases acting on phosphates
EC 4.2.99 - All other Lyases acting on carbon-oxygen bonds