Xylanases are classified into glycoside hydrolase families∗ .GH 5, 8, 10, 11, 30 and 43. This classification is based upon catalytic domains and among these families GH10 and GH11 are the most well studied [7]. Usually thermophilic enzymes are preferred over their mesophilic counterparts as high temperatures increases the rate of mass transfer and decreases contamination risk and viscosity of substrate [8,9]. For example bioconversion processes and pulp bleaching processes utilize xylanases but temperature at which these processes are carried out is quite high. Similarly,in preparing animal feed high temperature tolerant xylanase are mixed into the feed before pelleting process which is carried out at 70–95◦C.