1. Oxidoreductases

 2. Transferases

   2.1  Transferring one-carbon groups

   2.2  Transferring aldehyde or ketonic groups

   2.3  Acyltransferases

   2.4  Glycosyltransferases

   2.5  Transferring alkyl or aryl groups, other than methyl groups

   2.6  Transferring nitrogenous groups

   2.7  Transferring phosphorus-containing groups

   2.8  Transferring sulfur-containing groups

     2.8.1  Sulfurtransferases

     2.8.2  Sulfotransferases

     2.8.3  CoA-transferases

       2.8.3.1  propionate CoA-transferase

       2.8.3.2  oxalate CoA-transferase

       2.8.3.3  malonate CoA-transferase

       2.8.3.5  3-oxoacid CoA-transferase

       2.8.3.6  3-oxoadipate CoA-transferase

       2.8.3.8  acetate CoA-transferase

       2.8.3.9  butyrate---acetoacetate CoA-transferase

       2.8.3.10  citrate CoA-transferase

       2.8.3.11  citramalate CoA-transferase

       2.8.3.12  glutaconate CoA-transferase

       2.8.3.13  succinate---hydroxymethylglutarate CoA-transferase

       2.8.3.14  5-hydroxypentanoate CoA-transferase

       2.8.3.15  succinyl-CoA:(R)-benzylsuccinate CoA-transferase

       2.8.3.16  formyl-CoA transferase

       2.8.3.17  3-(aryl)acryloyl-CoA:(R)-3-(aryl)lactate CoA-transferase

       2.8.3.18  succinyl-CoA:acetate CoA-transferase

       2.8.3.19  CoA:oxalate CoA-transferase

       2.8.3.20  succinyl-CoA---D-citramalate CoA-transferase

       2.8.3.21  L-carnitine CoA-transferase

       2.8.3.22  succinyl-CoA---L-malate CoA-transferase

       2.8.3.23  caffeate CoA-transferase

       2.8.3.24  (R)-2-hydroxy-4-methylpentanoate CoA-transferase

       2.8.3.25  bile acid CoA-transferase

       2.8.3.26  succinyl-CoA:mesaconate CoA transferase

       2.8.3.27  propanoyl-CoA:succinate CoA transferase

       2.8.3.28  phenylsuccinyl-CoA transferase

     2.8.4  Transferring alkylthio groups

     2.8.5  Thiosulfotransferases

   2.9  Transferring selenium-containing groups

   2.10  Transferring molybdenum- or tungsten-containing groups

 3. Hydrolases

 4. Lyases

 5. Isomerases

 6. Ligases

 7. Translocases