Mannan

Mannan[1] may refer to a plant polysaccharide that is a linear polymer of the sugar mannose. Plant mannans have β(1-4) linkages. It is a form of storage polysaccharide. Ivory nut is a source of mannan.

Mannan may also refer to a cell wall polysaccharide found in yeasts. This type of mannan has a α(1-6) linked backbone and α(1-2) and α(1-3) linked branches. It is serologically similar to structures found on mammalian glycoproteins. Detection of mannan leads to lysis in the mannan-binding lectin pathway. This mannan is the source of MOS used as prebiotics in animal husbandry and nutritional supplements.

## Etymology

From 'manna', produced by several species of tree and shrub e.g. Fraxinus ornus from whose secretions mannitol was originally isolated.

## See also

* Alfa mannan degradation
* Mannan oligosaccharides (MOS)

## References

1. ↑ Mannan at the US National Library of Medicine Medical Subject Headings (MeSH)

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Types of carbohydrates

General|

* Aldose
* Ketose
* Furanose
* Pyranose

Geometry|

* Anomer
* Cyclohexane conformation
* Mutarotation

Monosaccharides|

| Dioses|

* Aldodiose
* Glycolaldehyde

|

Trioses|

* Aldotriose
* Glyceraldehyde
* Ketotriose
* Dihydroxyacetone

Tetroses|

* Aldotetroses
* Erythrose
* Threose
* Ketotetrose
* Erythrulose

Pentoses|

* Aldopentoses
* Arabinose
* Lyxose
* Ribose
* Xylose
* Ketopentoses
* Ribulose
* Xylulose
* Deoxy sugars
* Deoxyribose

Hexoses|

* Aldohexoses
* Allose
* Altrose
* Galactose
* Glucose
* Gulose
* Idose
* Mannose
* Talose
* Ketohexoses
* Fructose
* Psicose
* Sorbose
* Tagatose
* Deoxy sugars
* Fucose
* Fuculose
* Rhamnose

Heptoses|

* Ketoheptoses
* Mannoheptulose
* Sedoheptulose

Above 7|

* Octoses
* Nonoses
* Neuraminic acid

Multiple|

| Disaccharides|

* Cellobiose
* Isomaltose
* Isomaltulose
* Lactose
* Lactulose
* Maltose
* Sucrose
* Trehalose
* Turanose

|

Trisaccharides|

* Maltotriose
* Melezitose
* Raffinose

Tetrasaccharides|

* Stachyose

Other
oligosaccharides|

* Acarbose
* Fructooligosaccharide (FOS)
* Galactooligosaccharide (GOS)
* Isomaltooligosaccharide (IMO)
* Maltodextrin

Polysaccharides|

* Beta-glucan
* Oat beta-glucan
* Lentinan
* Sizofiran
* Zymosan
* Cellulose
* Chitin
* Chitosan
* Dextrin / Dextran
* Fructose / Fructan
* Inulin
* Galactose / Galactan
* Glucose / Glucan
* Glycogen
* Hemicellulose
* Levan beta 2→6
* Lignin
* Mannan
* Pectin
* Starch
* Amylopectin
* Amylose
* Xanthan gum

* Category

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