February 21, 2007 - Chapter 7

February 21, 2007 - Chapter 7 - The Electron Transport...

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The Electron Transport Chain (Respiratory Chain) The electrons removed from glucose are transferred to NAD and FAD 2 NADH + H + from glycolysis 6 NADH + H + from TCA cycle – 2 FADH 2 from TCA cycle • Electrons from NADH and FADH 2 now enter the electron transport chain A series of electron carriers in the inner mito. membrane Electrons are shuttled from one electron carrier to another
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The Electron Transport Chain The transfer of electrons drives the pumping of protons across the inner mito. membrane Transfer of electrons is exergonic [H+] in the inner membrane space > [H+] in the matrix Proton-motive force – the potential energy of the protons The protons diffuse back across the membrane through a proton channel called ATP synthase Coupled to ATP synthesis Oxidative phosphorylation
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Mitochondrion Outer mitochondrial membrane Intermembrane space Inner mitochondrial membrane Matrix of mitochondrion NADH Oxidation:
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Outer mitochondrial membrane
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February 21, 2007 - Chapter 7 - The Electron Transport...

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