OBSOLETE. Any process that stops or reduces the rate of endo-(1->4)-beta-xylanase activity, the catalysis of the endohydrolysis of (1->4)-beta-D-xylosidic linkages in xylans.
OBSOLETE. Any process that modulates the frequency, rate or extent of endo-(1->4)-beta-xylanase activity, the catalysis of the endohydrolysis of (1->4)-beta-D-xylosidic linkages in xylans.
OBSOLETE. Any process that activates or increases the frequency, rate or extent of endo-(1->4)-beta-xylanase activity, the catalysis of the endohydrolysis of (1->4)-beta-D-xylosidic linkages in xylans.