Adenosine Diphosphate

A compound which is used for energy transfer, being converted back to ATP during photosynthesis and respiration with the breakdown of carbohydrates and nutrients which provides for an additional phosphate group and which is then reformed into ATP, or where through its use in further metabolic processes ADP loses another phosphate group, thus being converted to adenosine monophosphate, having just one phosphate group remaining in the material compound along with adenine and ribose.