the influence of CABH-2 supplementation in xylitol productionwith different nitrogen sources (urea, ammonium sulfate, and yeastextract) was also investigated. All nitrogen sources were added tohydrolysates at a concentration of 3 g L−1. A batch xylitol produc-tion from CAB hemicellulosic hydrolysate with supplementationof nitrogen sources was performed according to the conditionsdescribed in item 2.4.