C₁₀H₁₂N₅O₆P An isomer of adenylic acid; crystal platelets with a melting point of 219-220°C; a key regulator which acts to control the rate of a number of cellular processes in bacteria, most animals, and some higher plants. Abbreviated cAMP. Also known as adenosine 3',5'-cyclic monophosphate; adenosine 3',5'-cyclic phosphate; adenosine 3',5'-monophosphate; 3',5'-AMP; cyclic AMP.