This definition appears rarely
Depending on the origin, the backbone structure is substituted to various degrees with acetyl, L-arabinofuranosyl, glucuronyl and 4-O-methylglucuronyl groups . Complete degradation of xylans requires the synergistic action of several enzymes of which EC3. 2. 1. 8-endo-beta-1, 4-xylanases are the crucial enzymes for depolymerization . In recent years, xylanses have attracted considerable research interest because of their potential industrial application, such as in biobleaching, paper making and in the food and animal feed industries [4-6].