All known effects of cyclic AMP eukaryotic cells results from
Activation of catalytic unit of adenylate cyclase
Activation of Synthestase
Activation of protein kinase
Phosphorylation of G protein
Cyclic AMP exces most 9f it's evgect by stimulating cAMP dependent protein kinase.these phosphorylation enzyme results in their activation or inhibitions Ref-KDT 7/e p46
General anatomy