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ATP - Adenosine Triphosphate - Definition

By Elizabeth Quinn, About.com

Created: November 29, 2007

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

Definition: ATP or Adenosine triphosphate is chemical compound that breaks down to release the energy responsible for muscle contraction. It is the only useable form of energy in the body.

Also See: Energy Pathways for Exercise - How Carbohydrate, Fat and Protein Fuels Exercise

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