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 wheat xylanase inhibiting protein I (XIP-I). Optimum pH is 6.0. Optimum temperature is 50 degrees Celsius. Glycan degradation; xylan degradation. Expression is under the control of transcription factor XYR1 and highly induced by xylan, carboxymethylcellulose (CMC), and hop cell wall. Belongs to the glycosyl hydrolase 10 (cellulase F) family.