FADH₂ is produced in the citric acid cycle by 4 a membrane-embedded enzyme complex, called succinate dehydrogenase, that contains bound FAD and carries out the reactions

succinate + FAD → fumarate + FADH² and FADH² → FAD + 2H⁺ + 2e^–

The redox potential of FADH₂, however, is only –220 mV. Referring to Panel 14–1 and Figure 14–22, suggest a plausible mechanism by which its electrons could be fed into the electron-transport chain. Draw  diagram to illustrate your proposed mechanism.

Panel 14–1

Figure 14–22

Transcribed Image Text:

voltmeter salt bridge 과 Areduced and Aoxidized in equimolar amounts 1 M H+ and 1 atmosphere H₂ gas