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Ribulose

Ribulose

IUPAC name	(3R,4R)-1,3,4,5-Tetrahydroxypentan-2-one
Other names	D-erythro-2-Pentulose Adonose Arabinulose Araboketose Ribosone
Identifiers
CAS number	488-84-6
PubChem	151261
SMILES	C([C@H]([C@H](C(=O)CO)O)O)O
Properties
Molecular formula	C₅H₁₀O₅
Molar mass	150.13
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and 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.

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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 photosynthetic process in green plants (carbon dioxide trap).

A synthetic form of ribulose known as sucroribulose is found in many brands of artificial sweeteners.

General:	Aldose \| Ketose \| Pyranose \| Furanose
Geometry:	Triose \| Tetrose \| Pentose \| Hexose \| Heptose \| Cyclohexane conformation \| Anomer \| Mutarotation
Small/Large:	Glyceraldehyde \| Dihydroxyacetone \| Erythrose \| Threose \| Erythrulose \| Sedoheptulose
Trioses:	ketotriose \| Aldotriose
Tetroses:	Erythrulose \| Erythrose \| Threose
Pentoses:	Arabinose \| Deoxyribose \| Lyxose \| Ribose \| Ribulose \| Xylose \| Xylulose
Hexoses:	Glucose \| Galactose \| Mannose \| Gulose \| Idose \| Talose \| Allose \| Altrose \| Fructose \| Sorbose \| Tagatose \| Psicose \| Fucose \| Rhamnose
Disaccharides:	Sucrose \| Lactose \| Trehalose \| Maltose
Polymers:	Glycogen \| Starch (Amylose \| Amylopectin) \| Cellulose \| Chitin \| Stachyose \| Inulin \| Dextrin
Glycosaminoglycans:	Heparin \| Chondroitin sulfate \| Hyaluronan \| Heparan sulfate \| Dermatan sulfate \| Keratan sulfate
Aminoglycosides:	Kanamycin \| Streptomycin \| Tobramycin \| Neomycin \| Paromomycin \| Apramycin \| Gentamicin \| Netilmicin \| Amikacin