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Biology LibreTexts

10: Electron Transport Chain and ATP Synthesis

Thumbnail: Mitochondrial cytochrome bc1. The membrane is shown schematically in gray. Cytochrome bc1 is the central pump in the flow of electrons powers proton pumps in cellular respiration and photosynthesis. It binds to ubiquinol, a carrier of hydrogen atoms that is found in the mitochondrial membrane, and removes two protons and two electrons.