urocanic acid

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ur·o·can·ic ac·id

(yūr'ō-kan'ik as'id),
4-Imidazoleacrylic acid; an acid derived from the oxidative deamination of l-histidine; present in sweat and in dog's urine; elevated levels are observed in cases of urocanate hydratase deficiency. The cis form, resulting from exposure to UV radiation, activates suppressor T cells.
Farlex Partner Medical Dictionary © Farlex 2012

u·ro·can·ic ac·id

(yūr'ō-kan'ik as'id)
Derived from the oxidative deamination of l-histidine; present in sweat; elevated levels are observed in cases of urocanate hydratase deficiency.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Norval, "Recent advances in urocanic acid photochemistry, photobiology and photoimmunology," Photochemical & Photobiological Sciences, vol.
Urocanic acid and formiminoglutamic acid excretion studies in a case with megaloblastic arrest.
The urocanic acid acts as a natural sunscreen of skin of animals and humans.
Thirteen of the 20 treatments applied to soil (succinic acid, [alpha]-ketoglutaric acid, mannitol, urocanic acid, L-asparagine, riboflavin, sucrose, uric acid, cellulose, root exudates, L-serine, [alpha]-ketobutyric acid, humic acid) resulted in significantly lower (P [less than or equal to] 0.05) MB-C than the control treatments (Fig.
For wavelengths less than 300 nm, epidermal thickness, aromatic amino acids, nucleic acids, urocanic acid, and melanin are the major factors that influence skin penetration and absorption.
The physical properties of the substances, melanin and urocanic acid, change with exposure to ultraviolet (UV) light.
The text begins with a few pages on Acacia then runs on through Benzalkonium chloride, Canthaxanthine, D and C Red No.22, Ethanol, FD and C Blue No.1, Geraniol, Imidazolidinyl urea, Kathon CG, Lactose, Mineral oil, Oleic acid, Parabens, Quaternium-15, Rosin, Saccharin and Talc down to Urocanic acid.
4:30 pm: New nature-inspired urocanic acid mimic preventing DNA damages and immunosuppressive signaling induced by ultraviolet-B radiations--Jean-Francois Nicolay, Exsymol SAM
Organic substrates were adjusted to a pH of 5.8-6.2 (Degens 1998) and included 2 amines (D-glucosamine, L-glutamine) and six amino acids (L-arginine, L-asparagine, L-glutamic acid, L-histidine, L-lysine, L-serine) added at 10mM; 2 carbohydrates (D-glucose, D-mannose) added at 75mM; and 15 carboxylic acids (L-aseorbic acid, citric acid, fumaric acid, gluconic acid, [alpha]-ketobutyric acid, [alpha]-ketoglutaric acid, [alpha]-ketovaleric acid, DL-malic acid, malonic acid, pantothenic acid, quinic acid, succinic acid, tartaric acid, uric acid, and urocanic acid) added at 100 mM (Degens and Vojvodic-Vnkovic 1999).
According to the company, Gamma-PGA is an effective hydrophilic humectant capable of increasing the production of NMFs including pyrrolidonecarboxylic acid (PCA), lactic acid and urocanic acid as compared to hyaluronic acid and soluble collagen.
The substrates used here were 2 amines (D-glucosamine, L-glutamine), 6 amino acids (L-arginine, L-asparagine, L-glutamic acid, L-histidine, L-lysine, L-serine), 2 carbohydrates (D-glucose, D-mannose), and 15 carboxylic acids (L-ascorbic acid, citric acid, fumaric acid, gluconic acid, [Alpha]-ketobutyric acid, [Alpha]-ketoglutaric acid, [Alpha]-ketovaleric acid, DL-malic acid, malonic acid, pantothenic acid, quinic acid, succinic acid, tartaric acid, uric acid, and urocanic acid), [Alpha]-DL-hydroxybutyric acid was excluded from the list of 25 substrates defined by Degens (1998b) because of the unavailability of the compound and poor response in previous work (Degens 1998a, 1998b, 1999).
that come from plants including urocanic acid (a carcinogen but it is natural!) and ferulic acid.