CAROL & MIKE WERNER / VISUALS UNLIMITED, INC. / SCIENCE PHOTO LIBRARY CAROL & MIKE WERNER / VISUALS UNLIMITED, INC. / SCIENCE PHOTO LIBRARY
Illustration of the production of adenosine triphosphate (ATP) in the mitochondria. The enzyme ATP synthase provides energy for the cell through the synthesis of adenosine triphosphate. ATP transports chemical energy within cells for metabolism. A cell obtains energy by converting ATP to ADP (adenosine diphosphate). The cell then converts ADP back to ATP using energy stored on food. Free radicals are byproducts of ATP production. They are useful in many body processes but may be harmful in excess. Natural antioxidants such as glutathione and the enzyme catalase convert free radicals to harmless compounds. Black=carbon, white=hydrogen, blue=nitrogen, orange=phosphate, yellow=sulfur; green=chlorine.
Model release not required. Property release not required.