Figure 1

Schematic representation of Xyloglucan (XyG) structure and related enzymatic activities. An oligosaccharide of XyG (XXFG) is represented. β-(1-4)-glucan synthase produce the glucan backbone, α-Xylosyl Tranferase (XXT) acts on transfer xylose residues to the main backbone, β-Galactosyl Tranferase transfers galactose residue to xylose and α-Fucosyl Transferase transfer fucose residue to galactose. Xyloglucan Transglycosylase/Hydrolase (XTH) acts on hydrolysis of XyG oligosaccharides and/or XyG transglycosylation. α-Xylosidase removes the xylose residues, β-Galactosidase removes the galactose, α-fucosidase removes the fucose and β-Glucosidase mobilizes glucose monosaccharide from the main glucan backbone.