The negatively charged phosphate groups in ATP repel each other, leading to high-energy phosphate bonds. When these bonds are broken and phosphate group(s) released (dephosphorylation), energy is released to help drive endergonic reactions. The addition of a phosphate group (phosphorylation) to ADP regenerates ATP.

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Energy Release and Regeneration through ATP/ADP

A compound comprised of adenine, ribose, and two phosphate groups; the addition of another phosphate group (phosphorylation) - a process that requires energy - forms ATP

University of Notre Dame

 A nucleotide found in RNA comprised of bonded adenine, ribose, one phosphate group

Adenosine monophosphate (AMP)

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