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Second Messenger Systems
Second Messengers; Intracellular Second Messenger; Messenger, Second; Messengers, Intracellular Second; Messengers, Second; Second Messenger; Second Messenger System; Second Messenger, Intracellular; Second Messengers, Intracellular
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.