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Author: Subject: Is NAD+ an electron carrier or is NADH an electron carrier?
Edward Elric
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[*] posted on 26-12-2009 at 14:14
Is NAD+ an electron carrier or is NADH an electron carrier?


I'm trying to understand the varying semantics that involve NAD+ and NADH.
For how I see it, NADH is the electron carrier, but NAD+ is a potential electron carrier.
I better see these two molecules as follows:

NADH is a reducing agent
NAD+ is an oxidizing agent

Is NAD+ an electron carrier?
I'm reading that it is, but I could only see that if NAD+ were to further breakdown.




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DJF90
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[*] posted on 26-12-2009 at 14:37


You are right about which one is reducing and the other oxidising. Remember that reduction is electron gain and oxidation is electron loss. Therefore NADH is a source of electrons (and NAD+ an electron "sponge" if you will...)
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[*] posted on 26-12-2009 at 14:51


NAD+ is an electron carrier, NADH is carrying electrons. Think of NAD+ as an empty pickup truck, it has the potential to carry something (electrons) when it is loaded up (NADH) it is carrieng electrons and is ready to dump them where they are needed (often the electron transport chain.)



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