ribulose [′rī·byə‚lōs]
Ribulose
(biochemistry)
C5H10O5A pentose sugar that exists only as a syrup; synthesized from arabinose by isomerization with pyridine; important in carbohydrate metabolism. Also known asD-erythropentose;D-riboketose.
Ribulose
A pentose sugar, also known as d -riboketose and d -erythropetulose; it has never been prepared in crystalline form, and exists only as a syrup. The structural formula of ribulose is shown below.
Ribulose-5-phosphate occurs in animal and plant tissues. It can be converted to ribulose-l, 5-diphosphate by a phosphokinase enzyme acting in the presence of adenosine triphosphate (ATP). The ribulose-5-phosphate is also a significant intermediate in the carbohydrate metabolism through the pentose phosphate pathway. See Carbohydrate metabolism, Monosaccharide
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