Effects of pH and temperature on the activity and stability of the recombinant Tth Abn endo-arabinanase. a. Optimal pH of the Tth Abn. b. pH stability of the Tth Abn. c. Effect of temperature on Tth Abn activity. d. The thermostability of the Tth Abn. The residual activity was monitored, and the maximum activity was defined as 100% (a, c) or initial activity was defined as 100% (b, d). Values shown were the mean of triplicate experiments, and the variation about the mean was below 5%.