And notice it's a trans, which means these two h atoms point along different directions. Now, the electrons that are taken from the ACL coenzyme are transferred onto flavin adenine dinucleotide, and then it is reduced into Fadh two. And the enzyme that catalyze this reaction is the acyl coenzyme adhdrogenase. Now, actually, we have three is design versions, three isozyme forms of acyl coenzyme Adhdrogenase. We have one that is known as the long chain, acyl coenzyme adhdrogenase. We have one that is called the medium chain and one that is called, that is called a short chain.