11H Complex I (NADH:ubiquinone oxidoreductase) and complex III (coenzyme Q: cytochrome c - oxidoreductase) each contain a 2Fe-2S iron sulfur cluster. However, the iron sulfur clusters have very distinct standard reduction potentials (E°). (i) Which iron-sulfur cluster can be expected to have a more positive standard reduction potential, 2Fe-2S in complex I or 2Fe-2S complex III? (ii) Briefly explain how it is possible for these 2Fe-2S iron sulfur clusters to have different E° values even though they have the same molecule structure?
11H Complex I (NADH:ubiquinone oxidoreductase) and complex III (coenzyme Q: cytochrome c - oxidoreductase) each contain a 2Fe-2S iron sulfur cluster. However, the iron sulfur clusters have very distinct standard reduction potentials (E°). (i) Which iron-sulfur cluster can be expected to have a more positive standard reduction potential, 2Fe-2S in complex I or 2Fe-2S complex III? (ii) Briefly explain how it is possible for these 2Fe-2S iron sulfur clusters to have different E° values even though they have the same molecule structure?
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Please answer both parts, i and ii
Transcribed Image Text:11H Complex I (NADH:ubiquinone oxidoreductase) and complex III (coenzyme Q: cytochrome c-oxidoreductase) each
contain a 2Fe-2S iron sulfur cluster. However, the iron sulfur clusters have very distinct standard reduction potentials (E°).
(i) Which iron-sulfur cluster can be expected to have a more positive standard reduction potential, 2Fe-2S in complex I or
2Fe-2S complex III?
(ii) Briefly explain how it is possible for these 2Fe-2S iron sulfur clusters to have different Eº values even though they have
the same molecule structure?
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