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[mass noun] A basic amino acid which is a constituent of most proteins. It is an essential nutrient in the diet of vertebrates, and is the source from which histamine is derived in the body.
- ‘In humans, histamine is synthesized from histidine, a conditionally-essential amino acid.’
- ‘Children also require two further amino acids, histidine and arginine.’
- ‘The most prevalent amino acid is cysteine with other major ones including tyrosine, histidine, lysine and arginine.’
- ‘The amount of the amino acids threonine, proline and histidine were also increased in roots of slag-cultivated maize plants.’
- ‘Amino acids like histidine and glutamic acid that readily form complexes with chromium were also shown to increase absorption.’
Late 19th century: from Greek histos web, tissue + -ide + -ine.
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