Xylan

Xylan is a wide family of highly complex polysaccharides that are found in plant cell walls and some algae. Xylan, the most abundant of the hemicelluloses in plant cell walls, has a linear backbone structure consisting of β-(1-4)-linked D-xylosyl residues that, depending on its origin, may contain branches of L-arabinofuranosyl, acetyl, D-glucuronosyl and 4-O-methylglucuronosyl residues.

Xylans are also cell wall constituants:

Of some green algae (mainly macrophytic siphonous genera, like Codium, Caulerpa or Bryopsis Genus). The linear backbone structure is then based on β-(1-3)-D-xylose chain.
Of some red algae (Nemaliales and Palmariales). According to their origins, they may be made of β-(1-3)- and/or β-(1-4)-D-xylose residues and may contain galactopyranosyl, uronic acids, sulfate and phosphate residues.

CHEMICAL STRUCTURE:

(4-O-Methyl-a-D-glucurono)-D-xylan

EXAMPLES OF BIOMASS SOURCES :

Palmaria palmata

POTENTIAL ACTIVITIES:
Xylan represents an interesting source of raw material for the preparation of modified polysaccharides with novel biological activities. In particular, anticoagulant, antithrombotic and antiviral activities has been shown for sulphated or phosphorylated xylan polysaccharides.

XYL100
Xylan polysaccharide Xylan polysaccharide is extracted and purified from the red seaweed Palmaria palmata. The polysaccharide is composed of mixed linked β-(1,3) and β-(1,4)-D-xylose. The polysaccharide contains sulfate and phosphate groups and the extremity is non-reduced.	1 mg, 10 mg, 100 mg