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Second messenger definition

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A second messenger is an intracellular metabolite or ion increasing or decreasing as a response to the stimulation of receptors by agonists, considered as the "first messenger". This generic term usually does not prejudge the rank order of intracellular biochemical events.


See also:

Schottky barrier diodes definition
scan length definition
S definition
scanning electron microscope (SEM) definition
Secondary Standard definition