Fig. 4From: Glycosyl hydrolase 11 (xynA) gene with xylanase activity from thermophilic bacteria isolated from thermal springsEffect of temperature on the activity (a) and stability (b) of xylanase from KBFB4 and VSDB5. The optimal activity was observed at 50 °C was expressed as the activity maxima 100% (a) and the activity at 40 °C was expressed as the activity maxima 100% (b). The optimal temperature for xylanase activity was measured at different temperatures ranging from 30 to 100 °C (a). To determine the thermostability, the enzyme was incubated at 40 °C, 50 °C, 60 °C, 70 °C and 80 °C for 30 min, followed by xylanase assay under standard conditions at pH 5 and 50 °C (b). The KBFB4 and VSDB5 are represented by filled circles (green) and filled squares (red), respectively. The deviation was not more than 10% from the meanBack to article page