MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY
Methionine amino acid molecule. Computer illustration showing the structure of a molecule of the amino acid methionine (C5.H11.NO2.S). Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white), nitrogen (blue), sulphur (yellow) and oxygen (red). Methionine is an essential amino acid, which are unable to be produced by the body and must be sourced from the diet. Its main functions include the building of various protein molecules and the synthesis of the amino acid cysteine.
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