And we'll talk about these processes in future. Lectras now, what we want to focus on in this lecture, however, is how we can use methionine and basically create homocysteine and then use that to ultimately generate the substance coenzyme A that can be used by our liver cells to actually generate glucose molecules. So in that particular case, the homocysteine basically undergoes a reaction that is catalyzed by cystionine beta synthase. And this enzyme uses vitamin B six, PLP. So paradoxyl phosphate. So we take a Serene, we basically remove water and we attach that Serene onto this sulfur here, and we form this intermediate cystionine.