FIG. 2.

Effect of pH on activity (solid circles) and stability (solid squares) of xylan-binding xylanase. The reaction pH values were adjusted with the following buffer systems: acetate buffer (pH 4.0 to 5.5), phosphate buffer (pH 6.0 to 6.5), Tris-HCl buffer (pH 7.0 to 9.0), Na₂CO₃-NaHCO₃ buffer (pH 9.5 to 11.0), Na₂HPO₄-NaOH buffer (pH 11.5 to 12.0), or KCl-NaOH buffer (pH 13.0).