Heptose
A heptose is a monosaccharide with seven carbon atoms.
They have either an aldehyde functional group in position 1 (aldoheptoses) or a ketone functional group in position 2 (ketoheptoses).
Examples
There are few examples of seven-carbon sugars in nature, among which are:
- sedoheptulose or D-altro-heptulose (a ketose), an intermediate in the Calvin cycle and in lipid A biosynthesis
- mannoheptulose, found in avocadoes
- L-glycero-D-manno-heptose (an aldose), a late intermediate in lipid A biosynthesis.
Ketoheptoses have 4 chiral centers, whereas aldoheptoses have 5.
References
Types of carbohydrates | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| General | |||||||||||||||
| Geometry | |||||||||||||||
| Monosaccharides |
| ||||||||||||||
| Multiple |
| ||||||||||||||
| |||||||||||||||
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.