Now, what's the importance of this sulfur and the positive charge on the sulfur? Well, this is basically a relatively unstable arrangement because we have a positive charge on this relatively electronegative sulfur atom. And so what that means is this molecule is a very good methyl donor. And that's precisely what our cells actually use this molecule for. This sand molecule is one of the more important donors of methyl groups inside our body. And whenever we want to methylate proteins, enzymes, neurotransmitter, hormones, and so forth, we can use this sam molecule.