1. Oxidoreductases

 2. Transferases

 3. Hydrolases

 4. Lyases

   4.1  Carbon-carbon lyases

   4.2  Carbon-oxygen lyases

     4.2.1  Hydro-lyases

     4.2.2  Acting on polysaccharides

       4.2.2.1  hyaluronate lyase

       4.2.2.2  pectate lyase

       4.2.2.3  mannuronate-specific alginate lyase

       4.2.2.5  chondroitin AC lyase

       4.2.2.6  oligogalacturonide lyase

       4.2.2.7  heparin lyase

       4.2.2.8  heparin-sulfate lyase

       4.2.2.9  pectate disaccharide-lyase

       4.2.2.10  pectin lyase

       4.2.2.11  guluronate-specific alginate lyase

       4.2.2.12  xanthan lyase

       4.2.2.13  exo-(1->4)-alpha-D-glucan lyase

       4.2.2.14  glucuronan lyase

       4.2.2.15  anhydrosialidase

       4.2.2.16  levan fructotransferase (DFA-IV-forming)

       4.2.2.17  inulin fructotransferase (DFA-I-forming)

       4.2.2.18  inulin fructotransferase (DFA-III-forming)

       4.2.2.19  chondroitin B lyase

       4.2.2.20  chondroitin-sulfate-ABC endolyase

       4.2.2.21  chondroitin-sulfate-ABC exolyase

       4.2.2.22  pectate trisaccharide-lyase

       4.2.2.23  rhamnogalacturonan endolyase

       4.2.2.24  rhamnogalacturonan exolyase

       4.2.2.25  gellan lyase

       4.2.2.26  oligo-alginate lyase

       4.2.2.27  pectin monosaccharide-lyase

       4.2.2.28  alpha-L-rhamnosyl-(1->4)-D-glucuronate lyase

       4.2.2.29  peptidoglycan lytic transglycosylase

     4.2.3  Acting on phosphates

     4.2.99  Other carbon-oxygen lyases

   4.3  Carbon-nitrogen lyases

   4.4  Carbon-sulfur lyases

   4.5  Carbon-halide lyases

   4.6  Phosphorus-oxygen lyases

   4.7  carbon-phosphorus lyases

   4.8  Nitrogen-oxygen lyases

   4.98  ATP-independent chelatases

   4.99  Other lyases

 5. Isomerases

 6. Ligases

 7. Translocases