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Stack #39922

Electron Transport Chain

QuestionAnswer
Complex 1 NADH dehydrogenase
NADH sends 2 e- to Coenzyme Q
NADH is a flavoprotein, helps generate proton gradient
NADH sends 2e to Fe-S centers to Ubiquinone
NADH transfers 4 protons out of matrix
NADH Coenzyme Q oxoreductase UQ/UQH2
Complex II Succinate dehydrogenase
FAD sends 2e- to UQ via Fe-S centers
FAD also a flavoprotein
FAD no proton movement
Complex III Coenzyme Q cytochrome C Reducatase
UQ Cyt-C Reductase each half translocates 2 protons each
UQ Cyt-C Reductase protons go to intermembrane space
UQ Cyt-C reductase transfers 1 e- to cytochrome C via Fe-S centers and cytocrhome C sends 1e- to UQ via heme "b"
Cytochrome C mobile 1 e- carrier on cytosolic side of intermembrane space
Cytochrome C involved in apoptosis
Complex IV cytochrome C oxidase
Cytochrome C oxidase Final 4 e- are sent to oxygen; 'a' type heme and Cu, 1 proton per e-
Created by: snowkhat