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. Plays an important role in causing fusarium head blight (FHB) on cereal crops. Endohydrolysis of (1->4)-beta-D-xylosidic linkages in xylans. Inhibited by the proteinaceous endoxylanase inhibitor I from T.aestivum (TAXI-I). Optimum pH is 8.0. Optimum temperature is 40 degrees Celsius. Glycan degradation; xylan degradation. Expression is highly induced by xylan. Belongs to the glycosyl hydrolase 11 (cellulase G) family.