PRETTYMOLECULES / SCIENCE PHOTO LIBRARY PRETTYMOLECULES / SCIENCE PHOTO LIBRARY
Melatonin, molecular model. The hormone melatonin (C13.H16.N2.O2) is a naturally occurring compound found in animals, plants and microbes. Its effects in animals include sleep timing, blood pressure regulation, and seasonal reproduction. Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white), nitrogen (blue) and oxygen (red).
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