Now, the alpha subunits, even though they're part of the hexama ring, they don't actually play a catalytic role. And even though these alpha units can in fact bind ATP molecules and they will have ATP molecules bound to them, they will not actually release the ATP molecules nor will they carry out any useful process. So although the alpha subunits of the hexamarine do contain ATP molecules bound to them, they do not release these ATP molecules nor will they actually carry out or participate in some reaction some useful reaction. On the other hand, the beta subbunits actually are the ones that will play that catalytic role. They have the ability to actually undergo these three reactions. They're the ones that bind the ATP and orthophosphere reactants.