And that GTP carrying G alpha protein goes on and binds onto this intracellular domain of the adenoid cyclist. And it stimulates this enzyme to basically carry out its function to transform ATP molecules into the secondary messenger molecules we call cyclic adenosine monophosphates or simply camp. So the dissociated G alpha domain in the GTP state moves and binds to another transmembrane protein, an enzyme, to be specific, called adenylyt cyclist. It stimulates the adenalyt cyclist to begin transforming the ATP into the cyclic Amp. These cyclic Amp molecules are what we call secondary messenger molecules. And that's because these secondary messenger molecules are intramolecular molecules found inside the cells that can diffuse into different regions and organelles found within that cell.