Chapter 19, Problem 3P

Summary Introduction

To explain:

FAD (flavin adenine dinucleotide) is more appropriate electron acceptor than NAD⁺ (nicotinamide adenine dinucleotide) based in the $E^{\prime }°$ (standard cell potential) values of fumarate/succinate, NAD⁺/NADH, and succinate dehydrogenase FAD/FADH₂ .

Introduction:

The beginning of oxidative phosphorylation takes place with the entry of electrons into a cascade of electron carriers. These electrons arise as a result of action of dehydrogenases that gather electrons and pass them to NAD⁺ and FMN (flavin adenine mononucleotide) or FAD. Most of the dehydrogenases use NAD⁺ as electron acceptor.