Utilization of corncob xylan as a sole carbon source for the biosynthesis of endo-1,4-β xylanase from Aspergillus niger KIBGE-IB36

Bioresources and Bioprocessing

Table 1 Effect of different nitrogen sources on endo-1,4-β xylanase production from Aspergillus niger KIBGE-IB36

Types of nitrogen source	Nitrogen source (5 g L⁻¹)	Specific activity (U mg⁻¹)
Organic nitrogen sources	Yeast extract	1713 ± 9.24
	Meat extract	2166 ± 11.4
	Tryptone	2028 ± 7.75
	Peptone	3069 ± 18.49
Inorganic nitrogen sources	Urea	1090 ± 8.22
	NH₄Cl	642 ± 8.86
	KNO₃	492 ± 10.43
	NH₄NO₃	360 ± 20.85
Combination of organic nitrogen sources	Yeast extract + tryptone	3116 ± 13.54
	Yeast extract + peptone	2539 ± 18.90
	yeast extract + meat extract	1215 ± 24.37
	Meat extract + peptone	4219 ± 8.65
	Meat extract + tryptone	3056 ± 9.46

All the experiments were performed in triplicate and the results expressed are the mean values of all experimental setup