Now, fatty acids cannot actually be used to form glucose molecules, and we'll discuss why in a future lecture. But the glycerol molecules can be used to form the glucose. And so the glycerol basically makes its way into the blood plasma and travels to our liver cells. And once inside these hepatitis, they undergo a two step process. The first step is catalyzed by glycerol kinase, and we use an ATP molecule. And so we transform glycerol into glycerol phosphate.