acid

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Related to xanthurenic acid: kynurenic acid, Quinolinic Acid
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Synonyms for acid

Synonyms for acid

Synonyms for acid

any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt

being sour to the taste

Related Words

having the characteristics of an acid

References in periodicals archive ?
That's the "genetic" part: Women who develop gestational diabetes have "weakness" in the enzymes that metabolize tryptophan into serotonin and melatonin, but no weakness in the enzymes that metabolize tryptophan into xanthurenic acid. Without the pregnancy levels of estrogen "putting pressure" on these weak enzymes, they can perform as they do in most women metabolizing tryptophan much less into xanthurenic acid and much more into many other molecules we've all heard about, including serotonin and melatonin.
With the high levels of estrogen during pregnancy, the weak enzymes falter5 and metabolize much more tryptophan than usual into xanthurenic acid and much less into melatonin, serotonin, and related molecules.
The researchers wrote: "Low vitamin B (6) levels appear to alter metabolic pathways which result in a lowering of the biologic activity of endogenous insulin." In English: vitamin B (6) strengthened specific weak enzymes so that less xanthurenic acid was available to "complexed" with insulin, blocking its activity.
The 1975 and 1977 research was actually done more than two decades afterseveral groups of researchers (8,9,10,11) had confirmed in the early 1950s that vitamin B (6) returned levels of xanthurenic acid to normal.
And a last fact: textbooks of laboratory medicine in the 1940s told us that higher than usual xanthurenic acid in urine is diagnostic for vitamin B (6) deficiency!
(pyridoxine) for suppressing the elimination of xanthurenic acid in pregnant and non-pregnant women following the oral intake of a measured quantity of tryptophan.
Yoshino, "Prooxidant action of xanthurenic acid and quinoline compounds: role of transition metals in the generation of reactive oxygen species and enhanced formation of 8-hydroxy-2'-deoxyguanosine in DNA," BioMetals, vol.
Hess, "Lens epithelial cell apoptosis and intracellular [Ca.sup.2+] increase in the presence of xanthurenic acid," BMC Ophthalmology, vol.
Hess, "Pathological apoptosis by xanthurenic acid, a tryptophan metabolite: activation of cell caspases but not cytoskeleton breakdown," BMC Physiology, vol.
Chignell, "Photochemical studies on xanthurenic acid," Photochemistry and Photobiology, vol.
Schey, "Photooxidation of lens proteins with xanthurenic acid: a putative chromophore for cataractogenesis," Photochemistry and Photobiology, vol.