Adenosine triphosphate.
ATP (adenosine triphosphate) has three phosphate groups that can be removed by hydrolysis to form ADP (adenosine diphosphate) or AMP (adenosine monophosphate).The negative charges on the phosphate group naturally repel each other, requiring energy to bond them together and releasing energy when these bonds are broken.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Energy in Living Systems. October 16, 2013."
http://cnx.org/content/m44431/latest/Figure_07_01_02.jpg
OpenStax CNX
CC BY 3.0.
