Ketose
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(Redirected from Ketoses)
A ketose is a sugar containing one ketone group per molecule.[1][2]
With three carbon atoms, dihydroxyacetone is the simplest of all ketoses and is the only one having no optical activity. Ketoses can isomerize into an aldose when the carbonyl group is located at the end of the molecule. Such ketoses are reducing sugars.
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[edit] List of ketoses
All ketoses listed here are 2-ketones:
- Trioses: dihydroxyacetone
- Tetroses: erythrulose
- Pentoses: ribulose, xylulose
- Hexoses: fructose, psicose, sorbose, tagatose
- Heptoses: sedoheptulose
- Octoses: D-manno-octulose (the basis for KDO)
- Nonoses: D-glycero-D-galacto-nonulose (the basis for neuraminic acid)
[edit] Qualitative reaction
General qualitative reaction for ketoses is Seliwanoff's test.
[edit] See also
[edit] References
- ^ Lindhorst, Thisbe K. (2007). Essentials of Carbohydrate Chemistry and Biochemistry (1st ed.). Wiley-VCH. ISBN 3527315284.
- ^ Robyt, John F. (1997). Essentials of Carbohydrate Chemistry (1st ed.). Springer. ISBN 0387949518.
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