Ribulose

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d-Ribulose
D-Ribulose.svg
Ribulose.svg
Names
IUPAC name
(3R,4R)-1,3,4,5-Tetrahydroxypentan-2-one
Other names
d-erythro-2-Pentulose
Adonose
Arabinulose
Araboketose
Ribosone
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
Properties
C5H10O5
Molar mass 150.130 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

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).

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