MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY MAURIZIO DE ANGELIS / SCIENCE PHOTO LIBRARY
Leucine amino acid molecule. Computer illustration showing the structure of a molecule of the amino acid leucine (C6.H13.NO2). Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white), nitrogen (blue) and oxygen (red). Leucine is an essential amino acid, which is unable to be produced by the body and must be sourced from the diet. It makes up approximately 9% of the body's protein structures and as such, is involved in muscle repair and growth, together with other amino acids such as isoleucine and valine.
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