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Second messenger systems

second messenger systems

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.


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... kinds of components, the nonliving and living systems. The nonliving components carry chemical ... point on the chromosome, producing a single messenger RNA. Rather, most eukaryotic genes consist ... to create polypeptide chains. But in the second case death can also help other cells in the ...

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