In one of the reactions of the citric acid cycle, 2e- and 2H…

In оne оf the reаctiоns of the citric аcid cycle, 2e- аnd 2H+ are removed from succinate to form fumarate. The 2e- and 2H+ are transferred to FAD to generate FADH2. This reaction, in which succinate is converted to fumarate, is _____.