Cyclic AMP

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In biochemistry, cyclic AMP is an "adenine nucleotide containing one phosphate group which is esterified to both the 3'- and 5'-positions of the sugar moiety. It is a second messenger and a key intracellular regulator, functioning as a mediator of activity for a number of hormones, including epinephrine, glucagon, and ACTH."[1]

Cyclic AMP, along with pyrophasphate, are formed by action of the enzyme adenylate cyclase on adenosine triphosphate (ATP).

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