"CL414381"^^ . "Second Messengers of Signal TransductionSYNCI" . . "Systems in which an intracellular signal is generated in response to an intercellular primary messenger such as a hormone or neurotransmitter. They are intermediate signals in cellular processes such as metabolism, secretion, contraction, phototransduction, and cell growth. Examples of second messenger systems are the adenyl cyclase-cyclic AMP system, the phosphatidylinositol diphosphate-inositol triphosphate system, and the cyclic GMP system.NCI" . "Intracellular Second Messenger"^^ . "Intracellular Second Messenger"^^ . "Intracellular_Second_Messenger"^^ . . "Chemical Viewed Functionally"^^ . "C1903"^^ . "Intracellular Second MessengerPTNCI" .