Cyclic [[adenosine monophosphate]] (cAMP, cyclic AMP, or 3',5'-cyclic adenosine monophosphate) is a second [[messenger]] important in many biological processes. cAMP is a derivative of [[adenosine triphosphate]] ([[ATP]]) and is used for intracellular [[signal transduction]] in many different organisms, conveying the cAMP-dependent pathway. It should not be confused with 5'-AMP-activated protein kinase (AMP-activated protein kinase).