Rhamnose
Rhamnose
Rhamnose (pronounced /ˈræm.noʊs/) is a naturally occurring deoxy sugar. It can be classified as either a methyl-pentose or a 6-deoxy-hexose. Rhamnose occurs in nature in its L-form as L-rhamnose (6-deoxy-L-mannose). This is unusual, since most of the naturally occurring sugars are in D-form. Exceptions are the methyl pentoses L-fucose and L-rhamnose.
Etymology
The term "Rhamnose" is derived from Rhamnus, the genus of buckthorns, which contain a large amount of this sugar. The sugar was first isolated from the berries of Rhamnus, hence the name.
Related Terms
- Deoxy sugar: A sugar molecule that has had a hydroxyl group replaced with a hydrogen atom.
- Methyl-pentose: A type of sugar that contains five carbon atoms and one methyl group.
- 6-deoxy-hexose: A type of sugar that contains six carbon atoms and lacks one oxygen atom.
- L-form: The stereoisomer of a molecule that rotates plane-polarized light to the left.
- D-form: The stereoisomer of a molecule that rotates plane-polarized light to the right.
- L-fucose: A type of deoxy sugar that is found in a variety of organisms, including humans.
- Rhamnus: A large genus of shrubs, trees, and some vines, commonly known as buckthorns.
External links
- Medical encyclopedia article on Rhamnose
- Wikipedia's article - Rhamnose
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