_EC 5.3.2.- Interconverting keto- and enol- groups. 68 PDB entries  
EC 5.-.-.- Isomerases. [2,272 PDB entries]
EC 5.3.-.- Intramolecular oxidoreductases. [867 PDB entries]
EC 5.3.2.- Interconverting keto- and enol- groups. [68 PDB entries]    
EC Phenylpyruvate tautomerase. [50 PDB entries]
EC Oxaloacetate tautomerase. [-]
EC TDP-4-oxo-6-deoxy-alpha-D-glucose-3,4-oxoisomerase (dTDP-3-dehydro-6- [4 PDB entries]
EC TDP-4-oxo-6-deoxy-alpha-D-glucose-3,4-oxoisomerase (dTDP-3-dehydro-6- [-]
EC 2,3-diketo-5-methylthiopentyl-1-phosphate enolase. [6 PDB entries]
EC 2-hydroxymuconate tautomerase. [8 PDB entries]
EC Ascopyrone tautomerase. [-]
EC 4-oxalomesaconate tautomerase. [-]
EC 5.3.2.n1 Transferred entry: [-]

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