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- Q_cycle abstract "The Q cycle (named for CoQ10) describes a series of reactions that describe how the sequential oxidation and reduction of the lipophilic electron carrier, Coenzyme Q10 (CoQ10), between the ubiquinol and ubiquinone forms, can result in the net pumping of protons across a lipid bilayer (in the case of the mitochondria, the inner mitochondrial membrane).The Q cycle was first proposed by Peter D. Mitchell, though a modified version of Mitchell's original scheme is now accepted as the mechanism by which Complex III pumps protons (i.e. how complex III contributes to the biochemical generation of the proton or pH, gradient, which is used for the biochemical generation of ATP).To summarize, the first reaction of Q cycle is: CoQH2 + cytochrome c1 (Fe3+) → CoQ−• + cytochrome c1 (Fe2+) + 2 H+ (intermembrane)Then the second reaction of the cycle involves the reduction of the transient semiquinone by another electron to give CoQH2: CoQH2 + CoQ−• + cytochrome c1 (Fe3+) + 2 H+ (matrix) → CoQ + CoQH2 + cytochrome c1 (Fe2+) + 2 H+ (intermembrane)Combining the two equations, we have the overall reaction of Q cycle: CoQH2 + 2 cytochrome c1 (Fe3+) + 2 H+ (matrix) → CoQ + 2 cytochrome c1 (Fe2+) + 4 H+ (intermembrane)".
- Q_cycle thumbnail Complex_III.png?width=300.
- Q_cycle wikiPageID "3333075".
- Q_cycle wikiPageLength "5403".
- Q_cycle wikiPageOutDegree "27".
- Q_cycle wikiPageRevisionID "703673902".
- Q_cycle wikiPageWikiLink Adenosine_triphosphate.
- Q_cycle wikiPageWikiLink Category:Cellular_respiration.
- Q_cycle wikiPageWikiLink Category:Metabolism.
- Q_cycle wikiPageWikiLink Coenzyme_Q10.
- Q_cycle wikiPageWikiLink Coenzyme_Q_–_cytochrome_c_reductase.
- Q_cycle wikiPageWikiLink Cytochrome_b.
- Q_cycle wikiPageWikiLink Cytochrome_c.
- Q_cycle wikiPageWikiLink Cytochrome_c_oxidase.
- Q_cycle wikiPageWikiLink Heme.
- Q_cycle wikiPageWikiLink Hydrogen_bond.
- Q_cycle wikiPageWikiLink Lipid.
- Q_cycle wikiPageWikiLink Mitochondrion.
- Q_cycle wikiPageWikiLink Peter_D._Mitchell.
- Q_cycle wikiPageWikiLink Propionate.
- Q_cycle wikiPageWikiLink Proton.
- Q_cycle wikiPageWikiLink Rieske_protein.
- Q_cycle wikiPageWikiLink Semiquinone.
- Q_cycle wikiPageWikiLink Ubiquinol.
- Q_cycle wikiPageWikiLink File:Complex_III.png.
- Q_cycle wikiPageWikiLinkText "Q cycle".
- Q_cycle wikiPageWikiLinkText "Q-cycle".
- Q_cycle wikiPageUsesTemplate Template:Citation_needed.
- Q_cycle subject Category:Cellular_respiration.
- Q_cycle subject Category:Metabolism.
- Q_cycle type Process.
- Q_cycle comment "The Q cycle (named for CoQ10) describes a series of reactions that describe how the sequential oxidation and reduction of the lipophilic electron carrier, Coenzyme Q10 (CoQ10), between the ubiquinol and ubiquinone forms, can result in the net pumping of protons across a lipid bilayer (in the case of the mitochondria, the inner mitochondrial membrane).The Q cycle was first proposed by Peter D.".
- Q_cycle label "Q cycle".
- Q_cycle sameAs Q337603.
- Q_cycle sameAs Q-Zyklus.
- Q_cycle sameAs Cycle_Q.
- Q_cycle sameAs Cykl_Q.
- Q_cycle sameAs m.096b6d.
- Q_cycle sameAs Chu_trình_Q.
- Q_cycle sameAs Q337603.
- Q_cycle wasDerivedFrom Q_cycle?oldid=703673902.
- Q_cycle depiction Complex_III.png.
- Q_cycle isPrimaryTopicOf Q_cycle.