CMB 311 Lecture Notes - Lecture 10: Electron Acceptor, Electron Transport Chain, Coenzyme Q10

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Take electrons and transfer to oxygen; oxidation. Reactions are those in which electrons are transferred from a donor to acceptor. Oxidation: loss of electrons = reducing agent. Reduction: gain of electrons = oxidizing agent. Taking reduced organic compounds and oxidizing them. Movement of electrons : one molecule gets oxidized, one molecule gets reduced. The driving force behind atp production is the electron transfer potential of nadh or fadh2 relative to that of o2. Standard free-energy change go" is related to the change in reduction potential. Takes place in 4 large protein complexes in the inner mitochondrial membrane (electron-transport chain) Oxidation-reduction reactions enable the flow of electrons from nadh and. 1 + 2 don"t interact, but both transfer to 3, and 3 transfers to 4. # of proteins and electron carries in each complex. Electron carriers; coenzyme q and cytochrome c. Protons are pumped across the inner membrane to the intermembrane space, creating a h+ gradient.

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