Energy and Metabolism

ID #2208

Is it correct to say that "protons are produced when electrons are transferred to NAD+" ? When electrons are transferred to NAD+ I thought it was reduced to NADH. Isn't it just transferring the proton from one thing to another? Not producing one?

I agree that the wording in this sentence is vague, awkward at best, and really should say that a proton is released, not that a proton is produced. When NAD+ is reduced to NADH, the reaction is NAD+ + 2H --> NADH + H+. In most reduction reactions energy is transferred in the form of two protons and two electrons, but NAD+ only accepts two electrons and one H, and the other proton is released. I think this is the proton that they are referring to.

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