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Stack #39922
Electron Transport Chain
| Question | Answer |
|---|---|
| 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- |