_EC 1.3.5.- With a quinone or related compound as acceptor. 135 PDB entries  
EC 1.-.-.- Oxidoreductases. [8,653 PDB entries]
EC 1.3.-.- Acting on the CH-CH group of donors. [662 PDB entries]
EC 1.3.5.- With a quinone or related compound as acceptor. [135 PDB entries]    
EC 1.3.5.1 Succinate dehydrogenase (quinone). [52 PDB entries]
EC 1.3.5.2 Dihydroorotate dehydrogenase (quinone). [49 PDB entries]
EC 1.3.5.3 Protoporphyrinogen Ix dehydrogenase (menaquinone). [-]
EC 1.3.5.4 Fumarate reductase (quinol). [34 PDB entries]
EC 1.3.5.5 15-cis-phytoene desaturase. [-]
EC 1.3.5.6 9,9'-di-cis-zeta-carotene desaturase. [-]

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