1. Oxidoreductases

 2. Transferases

   2.1  Transferring one-carbon groups

   2.2  Transferring aldehyde or ketonic groups

   2.3  Acyltransferases

     2.3.1  Transferring groups other than aminoacyl groups

     2.3.2  Aminoacyltransferases

       2.3.2.1  D-glutamyltransferase

       2.3.2.2  gamma-glutamyltransferase

       2.3.2.3  lysyltransferase

       2.3.2.5  glutaminyl-peptide cyclotransferase

       2.3.2.6  lysine/arginine leucyltransferase

       2.3.2.7  aspartyltransferase

       2.3.2.8  arginyltransferase

       2.3.2.9  agaritine gamma-glutamyltransferase

       2.3.2.10  UDP-N-acetylmuramoylpentapeptide-lysine N6-alanyltransferase

       2.3.2.11  alanylphosphatidylglycerol synthase

       2.3.2.12  peptidyltransferase

       2.3.2.13  protein-glutamine gamma-glutamyltransferase

       2.3.2.14  D-alanine gamma-glutamyltransferase

       2.3.2.15  glutathione gamma-glutamylcysteinyltransferase

       2.3.2.16  lipid II:glycine glycyltransferase

       2.3.2.17  N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-(N6-glycyl)-D-alanyl-D-alanine-diphosphoundecaprenyl-N-acetylglucosamine:glycine glycyltransferase

       2.3.2.18  N-acetylmuramoyl-L-alanyl-D-glutamyl-L-lysyl-(N6-triglycine)-D-alanyl-D-alanine-diphosphoundecaprenyl-N-acetylglucosamine:glycine glycyltransferase

       2.3.2.19  ribostamycin:4-(gamma-L-glutamylamino)-(S)-2-hydroxybutanoyl-[BtrI acyl-carrier protein] 4-(gamma-L-glutamylamino)-(S)-2-hydroxybutanoate transferase

       2.3.2.20  cyclo(L-leucyl-L-phenylalanyl) synthase

       2.3.2.21  cyclo(L-tyrosyl-L-tyrosyl) synthase

       2.3.2.22  cyclo(L-leucyl-L-leucyl) synthase

       2.3.2.23  E2 ubiquitin-conjugating enzyme

       2.3.2.24  (E3-independent) E2 ubiquitin-conjugating enzyme

       2.3.2.25  N-terminal E2 ubiquitin-conjugating enzyme

       2.3.2.26  HECT-type E3 ubiquitin transferase

       2.3.2.27  RING-type E3 ubiquitin transferase

       2.3.2.28  L-allo-isoleucyltransferase

       2.3.2.29  aspartate/glutamate leucyltransferase

       2.3.2.30  L-ornithine Nalpha-acyltransferase

       2.3.2.31  RBR-type E3 ubiquitin transferase

       2.3.2.32  cullin-RING-type E3 NEDD8 transferase

       2.3.2.33  RCR-type E3 ubiquitin transferase

       2.3.2.34  E2 NEDD8-conjugating enzyme

       2.3.2.35  capsaicin synthase

       2.3.2.36  RING-type E3 ubiquitin transferase (cysteine targeting)

       2.3.2.37  ergosteryl-3beta-O-L-aspartate synthase

     2.3.3  Acyl groups converted into alkyl groups on transfer

   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

 3. Hydrolases

 4. Lyases

 5. Isomerases

 6. Ligases

 7. Translocases