_EC 1.2.99.- With other acceptors. 34 PDB entries  
EC 1.-.-.- Oxidoreductases. [8,010 PDB entries]
EC 1.2.-.- Acting on the aldehyde or oxo group of donors. [471 PDB entries]
EC 1.2.99.- With other acceptors. [34 PDB entries]    
EC Transferred entry: [-]
EC Carbon-monoxide dehydrogenase (acceptor). [26 PDB entries]
EC Aldehyde dehydrogenase (pyrroloquinoline-quinone). [-]
EC Formaldehyde dismutase. [1 PDB entries]
EC Formylmethanofuran dehydrogenase. [-]
EC Carboxylate reductase. [-]
EC Aldehyde dehydrogenase (FAD-independent). [7 PDB entries]
EC Glyceraldehyde dehydrogenase (FAD-containing). [-]

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