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. Now, the long chain basically acts on fatty acids that contain anywhere from twelve to 18 carbon atoms. The medium chain acts on fatty acids, which contain anywhere from four to 14 carbon atoms. And we're only talking about even number of carbon atoms.