_EC 5.4.-.- Intramolecular transferases. 766 PDB entries  
EC 5.-.-.- Isomerases. [5,284 PDB entries]
EC 5.4.-.- Intramolecular transferases. [766 PDB entries]
EC 5.4.1.- Transferring acyl groups. [9 PDB entries]
EC 5.4.2.- Phosphotransferases (phosphomutases). [322 PDB entries]
EC 5.4.3.- Transferring amino groups. [52 PDB entries]
EC 5.4.4.- Transferring hydroxy groups. [36 PDB entries]
EC 5.4.99.- Transferring other groups. [347 PDB entries]