IMED1003 Lecture Notes - Lecture 13: Hemoglobin, Phosphorylation, Reduction Potential
17 Sep 2018
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Electron transport chain and oxidative phosphsorylation: understand the significance of redox potential. Measure of ability of one molecule to pass electrons to another. More negative e" indicates stronger reductant so more readily donates electrons. E" = ability to pass electrons to another molecule: know the e" of oxygen and nadh & that oxygen is the terminal electron acceptor of respiration. Nadh e" -0. 32v: nadh is at a higher energy level than oxygen. Nadh- will more readily donate its electrons to the: more negative redox potential- higher energy level. As we move electrons- negative to positive energy level (potential) --- harness that energy that is released. When electrons pass from compound with more negative redox potential to one of more positive redox potential, energy is released. Electrons flow from more negative to more positive e". Note some contain iron in their prosthetic group (haem)
