_EC 1.4.2.- With a cytochrome as acceptor. 11 PDB entries  
EC 1.-.-.- Oxidoreductases. [21,435 PDB entries]
EC 1.4.-.- Acting on the CH-NH2 group of donors. [697 PDB entries]
EC 1.4.2.- With a cytochrome as acceptor. [11 PDB entries]
EC 1.4.2.1 glycine dehydrogenase (cytochrome). [-]
EC 1.4.2.2 nicotine dehydrogenase. [10 PDB entries]
EC 1.4.2.3 pseudooxynicotine oxidase. [1 PDB entries]

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