Adenosine triphosphate (ATP) is the energy currency formed in the mitochondria. It is a complex molecule formed of the adenosine, a nucleoside and a tail of three phosphates. These phosphate groups are linked to one another by two high-energy phosphoanhydride bonds. When one a phosphoanhydride is bond is broken and one phosphate is removed. As a result energy is released and ATP is converted to adenosine diphosphate (ADP).
