_EC 1.6.-.- Acting on Nadh or nadph. 239 PDB entries  
EC 1.-.-.- Oxidoreductases. [8,844 PDB entries]
EC 1.6.-.- Acting on Nadh or nadph. [239 PDB entries]    
EC 1.6.1.- With NAD(+) or NADP(+) as acceptor. [32 PDB entries]
EC 1.6.2.- With a heme protein as acceptor. [99 PDB entries]
EC 1.6.3.- With a oxygen as acceptor. [1 PDB entries]
EC 1.6.4.- (not defined) [6 PDB entries]
EC 1.6.5.- With a quinone or similar compound as acceptor. [56 PDB entries]
EC 1.6.6.- With a nitrogenous group as acceptor. [-]
EC 1.6.7.- (not defined) [-]
EC 1.6.8.- (not defined) [1 PDB entries]
EC 1.6.99.- With other acceptors. [44 PDB entries]

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