_EC 1.12.99.- With other acceptors. 80 PDB entries  
EC 1.-.-.- Oxidoreductases. [21,435 PDB entries]
EC 1.12.-.- Acting on hydrogen as donors. [251 PDB entries]
EC 1.12.99.- With other acceptors. [80 PDB entries]
EC 1.12.99.1 Transferred entry: 1.12.98.1. [-]
EC 1.12.99.2 Deleted entry. [-]
EC 1.12.99.3 Transferred entry: 1.12.5.1. [-]
EC 1.12.99.4 Transferred entry: 1.12.98.2. [-]
EC 1.12.99.5 Transferred entry: 1.13.11.47. [-]
EC 1.12.99.6 hydrogenase (acceptor). [80 PDB entries]

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