So it can be glucagon or it can be epinephrine that binds onto a specific seven transmembrane protein receptor found on the membrane of adipose cells. And once it actually binds, it creates a conformational change in that seven TM structure and that causes structural changes in the g protein. And what that does is it releases the GDP and it basically accepts the GTP. And once the GTP binds onto that g protein and activates the protein and the protein then travels and binds onto another membrane molecule known as adenylate cyclist. And what this enzyme basically does is, upon the binding, it is activated. Upon the binding of the g protein, it is activated, and it begins the conversion of ATP molecules into cyclic Amp molecules.