Before revision: 200px|Structure of ATP 200px|Structure of ADP 350px|Four possible resonance structures for orthophosphate ATP hydrolysis is the catabolic reaction process by which chemical energy that has been stored in the high-energy phosphoanhydride bonds in adenosine triphosphate (ATP) is released by splitting these bonds, for example in muscles, by producing work in the form of mechanical energy.
After revision: 200px|Structure of ATP 200px|Structure of ADP 350px|Four possible resonance structures for inorganic phosphate ATP hydrolysis is the catabolic reaction process by which chemical energy that has been stored in the high-energy phosphoanhydride bonds in adenosine triphosphate (ATP) is released by splitting these bonds, for example in muscles, by producing work in the form of mechanical energy.