1. Oxidoreductases

 2. Transferases

 3. Hydrolases

 4. Lyases

 5. Isomerases

 6. Ligases

 7. Translocases

   7.1  Catalysing the translocation of protons

   7.2  Catalysing the translocation of inorganic cations

   7.3  Catalysing the translocation of inorganic anions and their chelates

     7.3.2  Linked to the hydrolysis of a nucleoside triphosphate

       7.3.2.1  ABC-type phosphate transporter

       7.3.2.2  ABC-type phosphonate transporter

       7.3.2.3  ABC-type sulfate transporter

       7.3.2.4  ABC-type nitrate transporter

       7.3.2.5  ABC-type molybdate transporter

       7.3.2.6  ABC-type tungstate transporter

       7.3.2.7  arsenite-transporting ATPase

   7.4  Catalysing the translocation of amino acids and peptides

   7.5  Catalysing the translocation of carbohydrates and their derivatives

   7.6  Catalysing the translocation of other compounds