Fig. 3

Effect of temperature and pH on the activity and stability of recombinant xylanases. a Effect of temperature on the activity of XynA, XynB, XynC and XynD. Enzymes were incubated at 30 °C to 70 °C for 10 min at pH 5.0. b Effect of pH on activity of XynA, XynB, XynC and XynD. Enzymes were incubated at pH 3 to 10 for 10 min at 50 °C. c Temperature stability of XynA, XynB, XynC and XynD. Residual activities were measured under optimal conditions after incubation at 50 °C for different durations. d pH stability of XynA, XynB, XynC and XynD. Residual activities were determined after 30 min incubation at pH 5 to 10 on ice without substrate. Error bars are given as means and standard deviations