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Title: Ribulose  
Author: World Heritage Encyclopedia
Language: English
Subject: Pentose, Ketose, Carbohydrate, Ribulose-1,5-bisphosphate, Glyoxylate and dicarboxylate metabolism
Collection: Ketopentoses
Publisher: World Heritage Encyclopedia


IUPAC name
Other names
(D) YesY
(L) N
(DL) N
ChemSpider  N
Jmol-3D images Image

Image (L)

Molar mass 150.13 g·mol−1
 N  (: YesY/N?)

Ribulose is a ketopentose — a monosaccharide containing five carbon atoms, and including a ketone functional group. It has chemical formula C5H10O5. Two enantiomers are possible, D-ribulose (D-erythro-pentulose) and L-ribulose (L-erythro-pentulose). D-Ribulose is the diastereomer of D-xylulose.

Ribulose sugars are composed in the pentose phosphate pathway. They are important in the formation of many bioactive substances. For example, D-ribulose is an intermediate in the fungal pathway for D-arabitol production. Also, as the 1,5-bisphosphate, D-ribulose combines with carbon dioxide at the start of the photosynthesis process in green plants (carbon dioxide trap).

A synthetic form of ribulose

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