_EC 5.1.99.- Acting on other compounds. 87 PDB entries  
EC 5.-.-.- Isomerases. [5,284 PDB entries]
EC 5.1.-.- Racemases and epimerases. [683 PDB entries]
EC 5.1.99.- Acting on other compounds. [87 PDB entries]
EC 5.1.99.1 methylmalonyl-CoA epimerase. [6 PDB entries]
EC 5.1.99.2 16-hydroxysteroid epimerase. [-]
EC 5.1.99.3 allantoin racemase. [-]
EC 5.1.99.4 alpha-methylacyl-CoA racemase. [20 PDB entries]
EC 5.1.99.5 hydantoin racemase. [5 PDB entries]
EC 5.1.99.6 NAD(P)H-hydrate epimerase. [31 PDB entries]
EC 5.1.99.7 dihydroneopterin triphosphate 2'-epimerase. [2 PDB entries]
EC 5.1.99.8 7,8-dihydroneopterin epimerase. [23 PDB entries]

[-] signifies that there are no PDB entries for the given enzyme subclass