DR MARK J. WINTER / SCIENCE PHOTO LIBRARY DR MARK J. WINTER / SCIENCE PHOTO LIBRARY
Caffeine. Computer model of a molecule of caffeine. Atoms are represented as spheres and are colour-coded: carbon (light blue), hydrogen (yellow), nitrogen (dark blue) and oxygen (red). Caffeine is an alkaloid stimulant. It is found in tea, coffee, fizzy drinks and chocolate.
Model release not required. Property release not required.