And actually, Succinate dehydrogenase, the enzyme that catalyzes this step of the citric acid cycle, is found within complex two. So complex two is actually involved in the citric acid cycle in forming the fadh two molecule and extracting those electrons from Succinate to form fumerate. Now, complex two, for that reason, is also known as Succinate reductase, because we essentially abstract those electrons from Succinate, we oxidize it into fumerate, and we reduce the fad into fadh two. Now, once we form the fadh two, the fadh two remains bound to complex two. And in complex two, the two electrons are abstracted from fadh two, and they move on to series of iron sulfur clusters, iron sulfur groups. And ultimately, those two electrons end up being bound to Ubiquinone, coenzyme Q, the same coenzyme Q that we discussed in this particular case.