adenosine diphosphate

adenosine /aden·o·sine/ (ah-den´o-sēn) a purine nucleoside consisting of adenine and ribose; a component of RNA. It is also a cardiac depressant and vasodilator used as an antiarrhythmic and as an adjunct in myocardial perfusion imaging in patients incapable of exercising adequately to undergo an exercise stress test. Symbol A.

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cyclic adenosine monophosphate  a cyclic nucleotide, adenosine 3′,5′-cyclic monophosphate, that serves as an intracellular, and sometimes extracellular, “second messenger” mediating the action of many peptide or amine hormones. Abbreviated 3, cAMP, and cyclic AMP.

adenosine diphosphate  (ADP) a nucleotide, the 5′-pyrophosphate of adenosine, involved in energy metabolism; it is produced by the hydrolysis of adenosine triphosphate (ATP) and converted back to ATP by the metabolic processes oxidative phosphorylation and substrate-level phosphorylation.

adenosine monophosphate  (AMP) adenylic acid; a nucleotide, the 5′-phosphate of adenosine, involved in energy metabolism and nucleotide synthesis.

adenosine triphosphate  (ATP) a nucleotide, the 5′-triphosphate of adenosine, involved in energy metabolism and required for RNA synthesis; it occurs in all cells and is used to store energy in the form of high-energy phosphate bonds. The free energy derived from its hydrolysis is used to drive metabolic reactions, to transport molecules against concentration gradients, and to produce mechanical motion.

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adenosine diphosphate

n.

ADP.

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adenosine diphosphate (ADP),

a product of the hydrolysis of adenosine triphosphate.

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adenosine diphosphate (·deˑ·n·sēn dī·fsˑ·fāt),

n the compound produced when adenosine triphosphate (ATP) is hydrolyzed and energy is released. It is also used in the synthesis of ATP. Also called
ADP.