So if we look at the acetyl coenzyme A molecule, the coenzyme a component of the acetyl coenzyme A molecule prevents that acetyl group from actually moving across the inner mitochondrial membrane. And so to ultimately allow the movement of that acetyl coenzyme A molecule across, we have to remove that coenzyme A. And so what happens is we transfer this CETL group onto oxalo acetate in the process that is catalyzed by citrate synthase to form the citrate molecule. And now we can move that citrate across the inner and then the outer membrane of the mitochondria. And so this, if we recall, is simply the step number one in the citric acid cycle. Now, before we move on to the next steps of this process, actually moving it across the membrane of the mitochondria and then seeing what happens inside the cytoplasm, let's discuss which conditions actually lead to the synthesis of fatty acid.