TABLE 4.

Xylanase and cellulase activities in supernatants from direct cultivations of the parental strain and the Δxyr1 strains with xylan or cellulose as respective carbon sources

Cultivation time (h)	Xylanase activity (U/μg protein) in xylan supernatantsa,c		Cellulase activity (U/μg protein) in cellulose supernatantsb,c
	QM9414	Δxyr1	QM9414	Δxyr1
24	NDd	ND	0.003 ± 0.000	ND
48	0.206 ± 0.015	ND	0.655 ± 0.012	ND
72	0.142 ± 0.009	ND	0.885 ± 0.022	ND

^aOne unit of activity is defined as the amount of enzyme required to release 1 micromole of xylose reducing sugar equivalents per min under the defined assay conditions.

^bOne unit of activity is defined as the amount of enzyme required to release 1 micromole of glucose reducing sugar equivalents per min under the defined assay conditions.

^cValues are the means ± SD of results from three independent experiments.

^dND, no detection.