title: An EPR signal from the "invisible" copper of cytochrome oxidase.
mesh_terms: D003300:Copper; D004578:Electron Spin Resonance Spectroscopy; D003576:Electron Transport Complex IV / Q000037:antagonists & inhibitors; D006418:Heme; D007501:Iron; D008968:Molecular Conformation; D013440:Sulfides / Q000494:pharmacology
chemical_list: D013440:Sulfides; D006418:Heme; D003300:Copper; D007501:Iron; D003576:Electron Transport Complex IV