_EC 1.8.5.- With a quinone or similar compound as acceptor. 102 PDB entries  
EC 1.-.-.- Oxidoreductases. [21,435 PDB entries]
EC 1.8.-.- Acting on a sulfur group of donors. [762 PDB entries]
EC 1.8.5.- With a quinone or similar compound as acceptor. [102 PDB entries]
EC 1.8.5.1 glutathione dehydrogenase (ascorbate). [58 PDB entries]
EC 1.8.5.2 thiosulfate dehydrogenase (quinone). [-]
EC 1.8.5.3 respiratory dimethylsulfoxide reductase. [11 PDB entries]
EC 1.8.5.4 bacterial sulfide:quinone reductase. [20 PDB entries]
EC 1.8.5.5 thiosulfate reductase (quinone). [-]
EC 1.8.5.6 sulfite dehydrogenase (quinone). [-]
EC 1.8.5.7 glutathionyl-hydroquinone reductase. [5 PDB entries]
EC 1.8.5.8 eukaryotic sulfide quinone oxidoreductase. [8 PDB entries]
EC 1.8.5.9 protein dithiol:quinone oxidoreductase DsbB. [-]
EC 1.8.5.10 [DsrC]-trisulfide reductase. [-]

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