ATP, or adenosine triphosphate, is formed after the binding of one phosphate (phosphorylation) to one ADP (adenosine diphosphate) molecule. This is a process that stores energy into the produced ATP molecule.
When ATP gives energy to the cellular metabolism loses one of its phosphates and ADP reappears.
ADP can also lose more phosphates and generate AMP (adenosine monophosphate) or even nonphosphorylated adenosine. Adenosine production from ATP is a solution used in tissues that need urgent oxygen supply, for example, in the heart during myocardial infarction (heart **),
since adenosine has a local vasodilator the effect thus providing faster vasodilation than other physiological methods.
