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| Names | |||
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| IUPAC name d-erythro-Pent-2-ulose | |||
| Systematic 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) |
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| Properties | |||
| C5H10O5 | |||
| Molar mass | 150.130 g·mol−1 | ||
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |||
Ribulose is aketopentose — amonosaccharide containing fivecarbonatoms, and including aketonefunctional group. It haschemical formulaC5H10O5. Twoenantiomers are possible,d-ribulose (d-erythro-pentulose) andl-ribulose (l-erythro-pentulose).d-Ribulose is thediastereomer ofd-xylulose.
Ribulose sugars are composed in thepentose phosphate pathway fromarabinose.[1] They are important in the formation of many bioactive substances. For example,d-ribulose is an intermediate in the fungal pathway ford-arabitol production. Also, as the1,5-bisphosphate,d-ribulose combines withcarbon dioxide at the start of thephotosynthesis process in green plants (carbon dioxide trap).[2]
Ribulose has the same stereochemistry at carbons 3 and 4 as the five-carbonaldosesribose andarabinose.
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| Monosaccharides |
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| Multiple |
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