And the cyclic Amp is a secondary messenger in this particular cyclical transduction pathway. Now, the cyclic Amp molecules then move on to target protein. So PKA molecules protein kinase A. So cyclic Amp binds onto the regulatory units of the PKA. That causes the dissociation of the catalytic units from the PKA, and that activates the PKA. And once the PKA is actually activated, protein kinase A goes on to phosphorylate and activate two important types of enzymes involved in the breakdown and the mobilization of triglyceride.