_EC 3.1.8.- Phosphoric triester hydrolases. 75 PDB entries  
EC 3.-.-.- Hydrolases. [20,887 PDB entries]
EC 3.1.-.- Acting on ester bonds. [5,940 PDB entries]
EC 3.1.8.- Phosphoric triester hydrolases. [75 PDB entries]    
EC 3.1.8.1 Aryldialkylphosphatase. [47 PDB entries]
EC 3.1.8.2 Diisopropyl-fluorophosphatase. [28 PDB entries]