So these two h plus ions and one electron from each one of these two bonds is extracted and placed onto the fad to form the fadh two. And actually, this sucks in. A dehydrogenase that is used by the citric acid cycle is found within complex two. So complex two, found on the inside portion of the inner membrane of the mitochondria, as shown here, contains the succinate dehydrogenase that is used by the citric acid cycle. And so actually, when we synthesize the fadh two in the citric acid cycle, it remains attached onto the succinate dehydrogenase of this protein complex two. And within that complex, that fadh two is actually oxidized back into fad.