Fig. 3From: Heterologous expression of Aspergillus aculeatus endo-polygalacturonase in Pichia pastoris by high cell density fermentation and its application in textile scouringEffects of temperature (part a) and pH (part b) on stability of EndoPG. Thermostability was determined by incubating the enzyme at different temperatures (20–60 °C) in 100 mM sodium acetate buffer, pH 5 and measuring the residual activity under the optimal enzyme working conditions. For pH stability, the enzyme was incubated at various pH buffers 2.0–9.0 at 50 °C and the residual activity was measured after 24 h. The activity without pre-incubation was denoted as 100%. Data points are the mean values and error bars represent standard deviations from triplicate experimentsBack to article page