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, 3 or 4 (ketoheptoses). Ketoheptoses have 4 chiral centers, whereas aldoheptoses have 5.
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[1][2]
- mannoheptulose (a ketose), found in avocadoes[3]
- L-glycero-D-manno-heptose (an aldose), a late intermediate in lipid A biosynthesis.[4]
References
- .
- PMID 25037503.
- . Retrieved 2018-06-26.
- PMID 18056714.)
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