We have the beta domain shown in brown. And then we have this alpha Q domain which is a g protein. And so that's why we call this the g alpha Q protein. Now, before the binding takes place, we see that this g protein contains the GDP guanosine diphosphate bound to it. And what that means is the affinity of the g alpha Q protein for these two domains is very high. And so it will exist in this trimeric form and it would be bound to that seven transmembrane helix structure shown in green.