DR MARK J. WINTER / SCIENCE PHOTO LIBRARY DR MARK J. WINTER / SCIENCE PHOTO LIBRARY
Valine. Molecular model of the amino acid valine. Its chemical formula is C5.H11.N.O2. Atoms are represented as spheres and are colour-coded: carbon (blue), hydrogen (gold), oxygen (red) and nitrogen (dark blue). Amino acids are the building blocks of proteins. Valine is an essential amino acid. It cannot be synthesised by the body and so needs to be obtained from food. Foods high in valine include cottage cheese, fish, poultry, peanuts, sesame seeds, and lentils. Valine is important in muscle metabolism, repair and growth of tissue, regulating blood sugar levels, and providing the body with energy.
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