xylulose


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xylulose

 [zi´lu-lōs]
a pentose sugar occurring as d-xylulose and l-xylulose, one of the few l sugars found in nature; it is sometimes excreted in the urine (see pentosuria).

xy·lu·lose

(zī'lū-lōs),
threo-Pentulose; a 2-ketopentose. l-Xylulose appears in the urine in cases of essential pentosuria; it is also an intermediate in the glucuronate pathway.
Synonym(s): xyloketose

xylulose

/xy·lu·lose/ (zi´lu-lōs) a pentose epimeric with ribulose, occurring naturally as both l- and d-isomers. The latter is excreted in the urine in essential pentosuria; the former, in phosphorylated form, is an intermediate in the pentose phosphate pathway.

xy·lu·lose

(zī'lyū-lōs)
Threo-pentulose; a ketopentose that appears in the urine in cases of essential pentosuria; it is also an intermediate in the glucuronate pathway.
Xyluloseclick for a larger image
Fig. 317 Xylulose . Molecular structure of D-xylulose.

xylulose

a 5-CARBON KETOSE sugar.

xy·lu·lose

(zī'lyū-lōs)
A 2-ketopentose that appears in urine in patients with essential pentosuria; it is also an intermediate in the glucuronate pathway.

xylulose

a pentose sugar occurring as d-xylulose and as l-xylulose, one of the few l-sugars found in nature; it is sometimes excreted in the urine. See also pentosuria.
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References in periodicals archive ?
Regulation of ascorbic acid and of xylulose synthesis in rat-liver extracts.
Short Period Starvation in Rat: The Effect of Aloe Vera Gel Extract on Oxidative Stress Status Ion
Uyeda, "Xylulose 5-phosphate mediates glucose-induced lipogenesis by xylulose 5-phosphate-activated protein phosphatase in rat liver," Proceedings of the National Academy of Sciences of the United States of America, vol.
Chronic glucocorticoid-rich milieu and liver dysfunction
The pentose phosphate pathway intermediates, such as ribose 5-phosphate, ribulose 5-phosphate, and/or xylulose 5-phosphate, were elevated significantly in KSHV infected samples.
DNA Tumor Viruses and Cell Metabolism
cerevisiae is also able to ferment xylulose to ethanol since it possesses a xylulose kinase that is expressed in low amounts (Deng and Ho, 1990).
Screening of efficient ethanol tolerant yeast strain for production of bio-ethanol
In contrast to the mosquito strains, which possessed genes encoding for xylose isomerase (XylA) and xylulose kinase (XylB), these 2 genes were absent in the 3 strains we identified.
Evidence for Elizabethkingia anophelis transmission from mother to infant, Hong Kong
Isomerization of xylose to xylulose has been used to solve such challenge.
Current trends in bioethanol production by saccharomyces cerevisiae: substrate, inhibitor reduction, growth variables, coculture, and immobilization
They act in a pathway to convert xylose into xylitol, xylulose, and xylulose-5-phosphate, before eventually producing ethanol.
Souped-up yeast
It used in vivo to convert xylose to xylulose which is then phosphorylated and transferred to the pentose-phosphate pathway as well as it also catalyses the conversion of D-glucose to D-frutose in vitro.
This yeast cannot metabolize D-xylose however it can utilize D- xylulose the isomerization product of xylose (Wang and Schneider 1980).
XYLOSE ISOMERASES FROM THERMOTOGALES
We developed a sensitive liquid chromatography-tandem mass spectrometry (LC-MS/ MS) method to simultaneously analyze the intracellular sugar phosphates dihydroxyacetone phosphate (DHAP), glyceraldehyde 3-phosphate, erythrose 4-phosphate, ribose 5-phosphate, ribulose 5-phosphate, xylulose 5-phosphate, fructose 6-phosphate, glucose 6-phosphate, and sedoheptulose 7-phosphate in blood spots.
Profiling of pentose phosphate pathway intermediates in blood spots by tandem ass spectrometry: application to transaldolase deficiency

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