So once again, in the first step, we have an oxidation reaction in which the acyl coenzyme A is oxidized into inoil coenzyme A with a trans double bond between the alpha and the beta carbon. So this molecule, the product molecule, is known as the trans delta two Enoil coenzyme A, where the delta two basically means we have a double bond between the second carbon. That's why we have the second SuperScript, the two SuperScript, and the third carbon here. 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.