Endo-1,4-beta-xylanase involved in the hydrolysis of xylan, a major structural heterogeneous polysaccharide found in plant biomass representing the second most abundant polysaccharide in the biosphere, after cellulose. Endohydrolysis of (1->4)-beta-D-xylosidic linkages in xylans. Optimum pH is 6.0. Stable in the pH range from 4.0 to 8.0. Optimum temperature is 60 degrees Celsius. Around 53 percent activity is retained at 70 degrees Celsius. Stable from 30 to 60 degrees Celsius with maximum stability at 30 degrees Celsius. Glycan degradation; xylan degradation. Belongs to the glycosyl hydrolase 11 (cellulase G) family.