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Cysteine amino acid molecule
Cysteine amino acid molecule. Computer illustration showing the structure of a molecule of the amino acid cysteine (C3.H7.NO2.S). Atoms are represented as spheres and are colour-coded: carbon (black), hydrogen (white), nitrogen (blue), sulphur (yellow) and oxygen (red). This non-essential (synthesised by the body) amino acid plays an important role in protein synthesis, detoxification and other diverse metabolic functions. Cysteine is a genetically coded amino acid forming part of the antioxidant gluthanione, a compound that can be found in all tissues of the human body.
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