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. N-bromosuccinimide completely inhibits the catalytic activity. Optimum pH is 7.0. Optimum temperature is 60 degrees Celsius. Glycan degradation; xylan degradation. Expression is induced by oat spelt xylan but not by birchwood xylan, xylose, or xylitol. Expression is repressed by glucose. The promoter contains 3 creA consensus binding sites, 1 xlnR consensus binding site, and 3 pH activator pacC consensus binding sites. Belongs to the glycosyl hydrolase 10 (cellulase F) family.