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Histidine

Synonym(s)

  • His
  • histidine (substance)
  • L-histidine
  • (S)-2-amino-3-(1H-imidazol-4-yl)propanoic acid

Definition(s)

A semi-essential amino acid (children should obtain it from food) needed in humans for growth and tissue repair, histidine is important for maintenance of myelin sheaths that protect nerve cells and is metabolized to the neurotransmitter histamine. Histamines play many roles in immunity, gastric secretion, and sexual functions. Histidine is also required for blood cell manufacture and protects tissues against damage caused by radiation and heavy metals.

Definition from: NCI via Unified Medical Language SystemThis link leads to a site outside Genetics Home Reference. at the National Library of Medicine

Amino acid with side chain -CH2-C3H3N2.

Definition from: NCI via Unified Medical Language SystemThis link leads to a site outside Genetics Home Reference. at the National Library of Medicine

An essential amino acid that is required for the production of histamine.

Definition from: CHV via Unified Medical Language SystemThis link leads to a site outside Genetics Home Reference. at the National Library of Medicine

essential amino acid that contains the imidazole ring system.

Definition from: CSP via Unified Medical Language SystemThis link leads to a site outside Genetics Home Reference. at the National Library of Medicine

Related discussion in the Handbook

See also Understanding Medical Terminology.

 
Published: January 27, 2015