1. Oxidoreductases

 2. Transferases

   2.1  Transferring one-carbon groups

   2.2  Transferring aldehyde or ketonic groups

     2.2.1  Transketolases and transaldolases

       2.2.1.1  transketolase

       2.2.1.2  transaldolase

       2.2.1.3  formaldehyde transketolase

       2.2.1.4  acetoin---ribose-5-phosphate transaldolase

       2.2.1.5  2-hydroxy-3-oxoadipate synthase

       2.2.1.6  acetolactate synthase

       2.2.1.7  1-deoxy-D-xylulose-5-phosphate synthase

       2.2.1.8  fluorothreonine transaldolase

       2.2.1.9  2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase

       2.2.1.10  2-amino-3,7-dideoxy-D-threo-hept-6-ulosonate synthase

       2.2.1.11  6-deoxy-5-ketofructose 1-phosphate synthase

       2.2.1.12  3-acetyloctanal synthase

       2.2.1.13  apulose-4-phosphate transketolase

       2.2.1.-  

   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

   2.9  Transferring selenium-containing groups

   2.10  Transferring molybdenum- or tungsten-containing groups

   2.-  

 3. Hydrolases

 4. Lyases

 5. Isomerases

 6. Ligases

 7. Translocases