So this is one of the few enzymes inside our body that actually utilizes vitamin B twelve. The other enzyme we're going to talk about at the end. So this is our cycle that allows us to basically, number one, regenerate the methionine while forming that stem, and also regenerating the THF that can be used in various processes within our body. 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.