URINARY HISTIDINE
نویسندگان
چکیده
منابع مشابه
Histidine decarboxylase and urinary methylimidazoleacetic acid in gastric neuroendocrine cells and tumours.
AIM To study histidine decarboxylase (HDC) expression in normal and neoplastic gastric neuroendocrine cells in relationship to the main histamine metabolite. METHODS Control tissues from fundus (n = 3) and corpus (n = 3) mucosa of six patients undergoing operations for gastric adenocarcinoma, biopsy and/or gastric surgical specimens from 64 patients with primary gastric neuroendocrine tumours...
متن کامل13C-Enrichment of Urinary Uric Acid after l-[Ring-2-13C]Histidine Dose in Adult Humans
We determined whether ring-2 carbon of histidine is folate-dependently transferred to carbons 8 (C8) and/or 2 (C2) in urinary uric acid in humans. Two adults collected each urine void for four days. Aliquots of urine for the first day were used for baseline values; then the subjects ingested 0.7 g (3.3 mmol) of l-[ring-2-13C]histidine and collected urine for three experimental days. Aliquots we...
متن کاملHistidine biosynthesis.
Histidine (His) is one of the standard amino acids in proteins, and plays a critical role in plant growth and development. The chemical properties of the imidazole side group allow His to participate in acid-base catalysis, and in the co-ordination of metal ions. Despite the biological importance of this molecule, His biosynthesis has been somewhat neglected in plants, in stark contrast to micr...
متن کاملAttractive interactions between side chains of histidine-histidine and histidine-arginine-based cationic dipeptides in water.
Molecular dynamics simulations of histidine-based dipeptides in water show that a protonated histidine side chain group has a propensity for forming like-charged contact pairs with another protonated histidine or with arginine. This effect is of similar strength to that in previously observed arginine-arginine pairing. Even stronger contact pairs are formed in singly protonated or deprotonated ...
متن کاملA Theoretical Charge Density Investigation on Histidine-Histidine Dipeptide in Gas Phase
In the present work, an extensive theoretical calculation study on Histidine-Histidine dipeptide in gas phase is done by using DFT method with Gaussian 98 program. Through investigations on the molecular geometries of this molecule it is found that there is six rings in the molecules not two rings. The presence of four intramolecular hydrogen bonds is responsible for the formation of additional...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1941
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)72996-7