_EC 1.6.99.- With other acceptors. 48 PDB entries  
EC 1.-.-.- Oxidoreductases. [9,379 PDB entries]
EC 1.6.-.- Acting on Nadh or nadph. [252 PDB entries]
EC 1.6.99.- With other acceptors. [48 PDB entries]    
EC 1.6.99.1 Nadph dehydrogenase. [30 PDB entries]
EC 1.6.99.2 Transferred entry: 1.6.5.2. [-]
EC 1.6.99.3 Nadh dehydrogenase. [8 PDB entries]
EC 1.6.99.4 Transferred entry: 1.18.1.2. [-]
EC 1.6.99.5 Nadh dehydrogenase (quinone). [10 PDB entries]
EC 1.6.99.6 Transferred entry: 1.6.5.10. [-]
EC 1.6.99.7 Transferred entry: 1.5.1.34. [-]
EC 1.6.99.8 Transferred entry: 1.16.1.3. [-]
EC 1.6.99.9 Transferred entry: 1.16.1.4. [-]
EC 1.6.99.10 Transferred entry: 1.5.1.34. [-]
EC 1.6.99.11 Transferred entry: 1.16.1.5. [-]
EC 1.6.99.12 Transferred entry: 1.16.1.6. [-]
EC 1.6.99.13 Transferred entry: 1.16.1.7. [-]
EC 1.6.99.n1 Nadph dehydrogenase (coenzyme F420 dependent). [-]

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