So the enzyme pyruvate carboxylase transforms pyruvate into acetylcoenzyme a. Now, what happens to acetylco enzyme A? Well, we can use acetylcoenzyme A to help us generate fatty acids, but we can also use acetylcoenzyme A to help us generate ketone bodies. So by transforming acetyl coenzyme A to acetoacetalco enzyme A, this ultimately can be transformed into ketone bodies. Now, one fact that you have to remember is acetylco enzyme A cannot be used, at least inside humans, to actually generate glucose molecules. And what that means is, even though it seems like we can use acetyl coenzyme A, transform it into the citric acid cycle, ultimately form oxalo acetate, and then form glucose via glucoinogenesis, that is not actually true.