Xylulose

 ( Ketopentoses ) 

Xylulose is a ketopentose, a monosaccharide containing five carbon , and including a ketone functional group. It has the chemical formula . In nature, it occurs in both the L- and D-. 1-Deoxyxylulose is a precursor to via the DOXP pathway.

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Pathology L-Xylulose accumulates in the urine in patients with pentosuria, due to a deficiency in L-xylulose reductase. Since L-xylulose is a reducing sugar like D-glucose, pentosuria patients have been wrongly diagnosed in the past to be diabetic.

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