_EC 1.6.3.- With a oxygen as acceptor. 1 PDB entries  
EC 1.-.-.- Oxidoreductases. [8,653 PDB entries]
EC 1.6.-.- Acting on Nadh or nadph. [237 PDB entries]
EC 1.6.3.- With a oxygen as acceptor. [1 PDB entries]    
EC 1.6.3.1 NAD(P)H oxidase (H(2)O(2)-forming). [-]
EC 1.6.3.2 NAD(P)H oxidase (H(2)O-forming). [-]
EC 1.6.3.3 Nadh oxidase (H(2)O(2)-forming). [-]
EC 1.6.3.4 Nadh oxidase (H(2)O-forming). [-]
EC 1.6.3.5 Renalase. [1 PDB entries]

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