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Melezitose

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Title: Melezitose  
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Subject: Ash (analytical chemistry), Exophiala dermatitidis, Octose, Nonose, Sizofiran
Collection: Trisaccharides
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Melezitose

Melezitose
IUPAC name

(2R,3R,4S,5S,6R)-2-[[(2S,3S,4R,5R)-4-hydroxy-2,5-bis(hydroxymethyl)-3-[[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)-2-tetrahydropyranyl]oxy]-2-tetrahydrofuranyl]oxy]-6-(hydroxymethyl)tetrahydropyran-3,4,5-triol

Other names

Melicitose

Identifiers
CAS number  N
PubChem
ChemSpider  YesY
ChEBI  YesY
ChEMBL  YesY
Jmol-3D images Image 1
Properties
Molecular formula C18H32O16
Molar mass 504.44 g/mol
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N   YesY/N?)

Melezitose, also spelled melicitose, is a nonreducing trisaccharide sugar that is produced by many plant sap eating insects, including aphids such as Cinara pilicornis by an enzyme reaction. This is beneficial to the insects, as it reduces the stress of osmosis by reducing their own water potential. The melezitose is part of the honeydew which acts as an attractant for ants and also as a food for bees. This is useful to the lice as they have a symbiotic relationship with ants. Melezitose can be partially hydrolyzed to glucose and turanose the latter of which is an isomer of sucrose.

References

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