_EC 1.6.8.- (not defined) 1 PDB entries  
EC 1.-.-.- Oxidoreductases. [9,371 PDB entries]
EC 1.6.-.- Acting on Nadh or nadph. [253 PDB entries]
EC 1.6.8.- (not defined) [1 PDB entries]    
EC 1.6.8.1 Transferred entry: 1.5.1.38, 1.5.1.39 and 1.5.1.41. [1 PDB entries]
EC 1.6.8.2 Transferred entry: 1.5.1.30. [-]

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