cyclic AMP



A derivative of  ATP that is widespread in animal cells as a second messenger in many bio­chemical reactions induced by hor­mones. Upon reaching their target cells, the hormones activate adeny­late cyclase, the enzyme that cataly­ses cyclic AMP production. Cyclic AMP ultimately activates the en­zymes of the reaction induced by the hormone concerned. Cyclic AMP is also involved in controlling gene ex­pression and cell division, in im­mune responses, and in nervous transmission.



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