Xylan is a major constituent of the secondary cell wall and plant cell-wall polysaccharides. Xylan is also used in the studies involving structural properties, foaming as a new means for food structuring in plants. Xylanases an enzymatic form of xylan is used in several biotechnological processes, primarily for biopulping and biobleaching in the paper industry and as accessory enzymes for bioethanol production.