_EC 1.6.3.- With oxygen as acceptor. 29 PDB entries  
EC 1.-.-.- Oxidoreductases. [21,435 PDB entries]
EC 1.6.-.- Acting on Nadh or nadph. [505 PDB entries]
EC 1.6.3.- With oxygen as acceptor. [29 PDB entries]
EC 1.6.3.1 NAD(P)H oxidase (H2O2-forming). [21 PDB entries]
EC 1.6.3.2 NAD(P)H oxidase (H2O-forming). [-]
EC 1.6.3.3 Nadh oxidase (H2O2-forming). [-]
EC 1.6.3.4 Nadh oxidase (H2O-forming). [3 PDB entries]
EC 1.6.3.5 renalase. [5 PDB entries]

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