histidine

histidine
/his"ti deen', -din/, n. Biochem.
an essential amino acid, C3H3N2CH2CH(NH2)COOH, that is a constituent of proteins and is important as the iron-binding site in hemoglobin.
Also, histidin /his"ti din/. Abbr.: His; Symbol: H.
[1895-1900; HIST- + -ID3 + -INE2]

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One of the essential amino acids, first isolated in 1896.

It occurs abundantly in hemoglobin and can be isolated from blood cells. It is used in medicine and biochemical research and as a dietary supplement and feed additive.

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      an amino acid obtainable by hydrolysis of many proteins. A particularly rich source, hemoglobin (the oxygen-carrying pigment of red blood cells) yields about 8.5 percent by weight of histidine. First isolated in 1896 from various proteins, histidine is one of several so-called essential amino acids for human beings; they cannot synthesize it and require dietary sources. In microorganisms histidine is synthesized from the sugar ribose and the nucleotide adenosine triphosphate.

       histamine (q.v.), a compound involved in the physiological processes associated with allergic reactions, is formed in the human body by decarboxylation of histidine.

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Universalium. 2010.

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Look at other dictionaries:

  • Histidine — L ou S( ) histidine D ou R(+) histidine …   Wikipédia en Français

  • histidine — [ istidin ] n. f. • 1897; mot all., de hist(o) , ide et ine ♦ Biochim. L un des vingt acides aminés constituants des protéines, et qui possède un noyau imidazole. ● histidine nom féminin Acide aminé essentiel, composant important de la carnosine… …   Encyclopédie Universelle

  • histidine — histidine. См. гистидин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • histidine — complex amino acid, 1896, from Ger. histidin; see HISTO (Cf. histo ) + chemical suffix idine …   Etymology dictionary

  • histidine — [his′ti dēn΄, his′tidin] n. [< Gr histion (see HISTIOCYTE) + INE3] a nonessential amino acid, C3H3N2CH2CH(NH) 2COOH, that is essential for growth in infancy: see AMINO ACID …   English World dictionary

  • Histidine — NatOrganicBox name=2 amino 3 (3H imidazol 4 yl)propanoic acid synonyms=Imidazole alanine PubChem = 773 CAS = 71 00 1 SMILES = N [C@@H] (Cc1 [nH] cnc1)C(O)=O C=6 | H=9 | N=3 | O=2 mass=155.16 g/molHistidine (abbreviated as His or H) [cite web |… …   Wikipedia

  • histidine — α Amino β (4 imidazolyl)propionic acid; the l isomer is a basic amino acid found in most proteins. It is a nutritionally essential amino acid in mammals. h. ammonia lyase an enzyme catalyzing deamination of l h. to urocanate and ammonia; this… …   Medical dictionary

  • histidine — histidinas statusas T sritis chemija santrumpa( os) His, H atitikmenys: angl. histidine rus. гистидин ryšiai: sinonimas – 2 amino 3 (1H imidazolil 4 )propano rūgštis …   Chemijos terminų aiškinamasis žodynas

  • Histidine-tryptophan-ketoglutarate — Histidine tryptophan ketoglutarate, or Custodiol HTK solution is a high flow, low potassium preservation solution used for organ transplantation. HTK solution is intended for perfusion and flushing of donor liver kidney, heart, lung and pancreas… …   Wikipedia

  • histidine operon — histidine operon. См. гистидиновый оперон. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

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