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茯苓聚糖[1,3-β-D-葡聚糖]
 
中文名：茯苓聚糖[1,3-β-D-葡聚糖]
英文名：Pachyman (1,3-β-D-Glucan)
结构式：

High purity Pachyman (1,3-β-D-Glucan) for use in research, biochemical enzyme assays and in vitro diagnostic analysis.
Purity > 95%. For the assay of endo-1,3-β-D-glucanase.

CAS NO. 54724-00-4
SOURCE: Pachyman is a 1,3-b-D-glucan derived from the sclerotia of Poria cocos (a Basidiomycetes sp.). It is reported to contain approx. 100% of 1,3-linked D-glucosyl residues. Curdlan is produced by Alcaligenes faecalis var. myxogenes 10C3K. Essentially all of the linkages are 1,3-b-.
PROPERTIES OF PACHYMAN:
Colour: Off-white powder.
Purity: Contains > 98% D-glucose essentially all of which is 1,3-b-linked.
Solubility: Insoluble in water at room temperature.
Enzyme susceptibility: Hydrolysed by endo-1,3-b-glucanase.
PROPERTIES OF CURDLAN:
Colour: White powder.
Purity: Contains > 99% D-glucose essentially all of which is 1,3-b-linked.
Solubility: Insoluble in water. Can be solubilised in 10% sodium hydroxide
Enzyme susceptibility: Resistant to hydrolysis by endo-1,3-b-glucanase due to water insolubility of the substrate. Dissolution in sodium hydroxide followed by neutralisation with acetic acid yields an amorphous-type substrate which is more readily attacked by b-glucanase.