_EC 5.1.2.- Acting on hydroxy acids and derivatives. 40 PDB entries  
EC 5.-.-.- Isomerases. [5,284 PDB entries]
EC 5.1.-.- Racemases and epimerases. [683 PDB entries]
EC 5.1.2.- Acting on hydroxy acids and derivatives. [40 PDB entries]
EC 5.1.2.1 lactate racemase. [6 PDB entries]
EC 5.1.2.2 mandelate racemase. [18 PDB entries]
EC 5.1.2.3 3-hydroxybutyryl-CoA epimerase. [11 PDB entries]
EC 5.1.2.4 acetoin racemase. [-]
EC 5.1.2.5 tartrate epimerase. [-]
EC 5.1.2.6 isocitrate epimerase. [-]
EC 5.1.2.7 tagaturonate epimerase. [5 PDB entries]

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