D-Galacto-D-mannan
from Ceratonia siliqua
~95% (HPLC)
Synonym: Carob galactomannan
Properties
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Related Categories
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Biochemicals and Reagents, Carbohydrate adjuvants,Carbohydrates, Carbohydrates A to Z, Carbohydrates G,
More...
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assay
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~95% (HPLC)
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mol wt
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Mr ~200000
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loss
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≤5% loss on drying
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cation traces
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Ca: ≤1000 mg/kg
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Cd: ≤5 mg/kg
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Co: ≤5 mg/kg
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Cr: ≤5 mg/kg
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Description
Other
Notes
Reserve carbohydrate from the endosperm walls of
some legume seeds. Galactomannans: properties and applications; Improved resolution of DNA fragments in
polysaccharide-supplemented agarose gels
Application
D-Galacto-D-mannan is a plant cell wall
polysaccharide useful as a reference compound in procedures that analyse plant
cell wall polysaccharide composition. D-Galacto-D-mannan is a potential
anti-oxidant that protects plant cell walls.
Galactomannans are polysaccharides consisting
of a mannose backbone
with galactose side groups (more specifically, a (1-4)-linked
beta-D-mannopyranose backbone with branchpoints from their 6-positions linked
to alpha-D-galactose, i.e. 1-6-linked alpha-D-galactopyranose).
Detailed description
In order of increasing number of
mannose-to-galactose ratio:
Galactomannans are often used in food products to
increase the viscosity of the water phase.
Guar gum has been used to add viscosity to artificial tears, but is not as
stable as carboxymethylcellulose.
Food use
Galactomannans are used in foods as stabilisers.
Guar and locust bean gum (LBG) are commonly used in ice cream to improve
texture and reduce ice cream meltdown. LBG is also used extensively in cream
cheese, fruit preparations and salad
dressings. Tara gum is seeing growing acceptability as a food ingredient but is
still used to a much lesser extent than guar or LBG. Guar has the highest usage
in foods, largely due to its low and stable price.
Clinical use
Galactomannan is a component of the cell wall of the
mold Aspergillus and is
released during growth. Detection of galactomannan in blood is used to diagnose
invasive aspergillosis infections
in humans. This is performed with monoclonal antibodies in a
double-sandwich ELISA; this assay
from Bio-Rad Laboratories
was approved by the FDA in 2003 and is of moderate accuracy. The assay is
most useful in patients who have had hemopoetic cell transplants (stem cell
transplants). False positive Aspergillus Galactomannan test have been found in
patients on intravenous treatment with some antibiotics or fluids containing
gluconate or citric acid such as some transfusion platelets, parenteral
nutrition or PlasmaLyte.
PRICE
$5137.31/KG OR $2335.14/IB
For more information:
mobile: +2348039721941
contact person: emeaba uche
e-mail: emeabau@yahoo.com
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