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

From: Utilization of corncob xylan as a sole carbon source for the biosynthesis of endo-1,4-β xylanase 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
  1. All the experiments were performed in triplicate and the results expressed are the mean values of all experimental setup