This compound is the product of an enzyme whose six different classes have no sequence or structural homology. This compound can bind to f-channels to (-5[1])increase the pacemaker current. (-5[1])This compound’s intracellular levels increase in response to the activation of Golf (“golf”) in the (*) olfactory system. This compound’s intracellular level increases over 100-fold due to the action of cholera toxin, which subsequently causes excess CFTR activity. This substrate (-5[1])of PDE4 is necessary for the activity of protein kinase A. GS (10[1])(“G-sub-s”) G proteins increase intracellular levels of this compound. The classic second messenger molecule is, (10[1]-5[1])for 10 points, (-5[1])what compound produced from ATP by adenylyl cyclase? ■END■ (0[6])