Sandbox Reserved 1600: Difference between revisions

An electron source is needed in order for the redox reaction of O₂ to occur. Cytochrome bd oxidase uses the quinol molecule [https://en.wikipedia.org/wiki/Coenzyme_Q10 ubiquinone] as an electron donor. [[Image:Ubiquinone.jpg|200 px|right|thumb|Figure 2. Chemical structure of ubiquinone.]] As shown in the <scene name='83/838655/Bdoxidase_structure_full/4'>overall structure</scene> the <scene name='83/838655/Bdoxidase_q_loop/2'>Q loop</scene> is on the extracellular surface and provides a binding site for ubiquinone.<ref name = ”Safarian” /> As mentioned in the Active Site section, Heme <scene name='83/838655/Bdoxidase_qloop_zoom/3'>B558 is closest in proximity to the Q loop</scene> and thus is the suggested [https://en.wikipedia.org/wiki/Electron_acceptor electron acceptor]. This suggestion is further supported by the conservation of <scene name='83/838655/Bdoxidase_trp/2'>Trp374</scene> often found as intermediate electron receptors in biological [https://en.wikipedia.org/wiki/Electron_transport_chain electron transfer chains].<ref name =”Safarian” />