Two commonly occurring redox co-factors in respiratory complexes?

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MMMargiela
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Im still confused on what a cofactor or coenzyme is in relation to oxidative phosphorylation
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MMMargiela
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Kell_
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AFAIK cofactors aren't involved.
Coenzyme Q is the first electron carrier to accept electrons from reduced NAD in Chemiosmis which allows Oxidative Phosporylation to occur by generating the Hydrogen gradient. Other than that, I can't think of how you would be asked this as question in the exam.
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thegodofgod
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(Original post by MMMargiela)
Im still confused on what a cofactor or coenzyme is in relation to oxidative phosphorylation
(Original post by Kell_)
AFAIK cofactors aren't involved.
Coenzyme Q is the first electron carrier to accept electrons from reduced NAD in Chemiosmis which allows Oxidative Phosporylation to occur by generating the Hydrogen gradient. Other than that, I can't think of how you would be asked this as question in the exam.
I think you're referring to NADH and FADH2? They are reduced forms of the respective coenzymes NAD+ and FAD, which help oxidise molecules during glycolysis / link reaction and Krebs cycle, by becoming reduced themselves to NADH and FADH2. These are re-oxidised by enzymes in the electron transport chain, the end result of which is the synthesis of ATP.

Have a look here to see what cofactors and coenzymes are, and understand the differences between them: http://en.wikipedia.org/wiki/Cofactor_(biochemistry).
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