Now, within Aromthione, this blue section will ultimately end up being part of the subtle coenzyme A. This green section will basically be important in this molecule here, as we'll see in just a moment. So how do we get from methionine to this molecule? Well, basically this step is catalyzed by methionine adenosyl transferase. And what this enzyme does is it takes an adenosine group from the ATP. It basically kicks off those phosphate groups and attaches that adenosine onto this sulfur.