So as soon as that g alpha domain binds the GTP, it loses its affinity not only for this seven TM membrane protein, it also loses affinity for this dimer structure here that consists of this beta in orange and the gamma in purple. And so what happens is there is a dissociation process that takes place and this GTP that is or this GTP carrying structure essentially dissociates from not only the green structure, but also from this dimer structure we call the g beta gamma structure or the g beta gamma dimer. So upon binding, the epinephrine induces conformational changes in the seven TM that stimulates the g protein, the alpha region, to release the GDP and bind the GTP guanosine triphosphate. This also causes the betagama or the g betagama dimer to dissociate from that Galpha protein, as shown in this diagram. Now, this simply dissociates away. But what happens to this GTP structure?