_EC 1.4.9.- With a copper protein as acceptor. 68 PDB entries  
EC 1.-.-.- Oxidoreductases. [21,435 PDB entries]
EC 1.4.-.- Acting on the CH-NH2 group of donors. [697 PDB entries]
EC 1.4.9.- With a copper protein as acceptor. [68 PDB entries]
EC 1.4.9.1 methylamine dehydrogenase (amicyanin). [41 PDB entries]
EC 1.4.9.2 aralkylamine dehydrogenase (azurin). [27 PDB entries]