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. 2004 May;186(9):2891–2896. doi: 10.1128/JB.186.9.2891-2896.2004

FIG. 2.

FIG. 2.

Effects of pH and temperature on the activity and stability of A1-II′(S). (A) Effect of pH, determined with sodium acetate (open squares), sodium HEPES (closed squares), Tris-HCl (open circles), and glycine-sodium hydroxide (closed circle). The activity at pH 7.5 in sodium HEPES was taken as 100%. (B) Optimal temperature. The activity at 40°C was taken as 100%. (C) Thermal stability. The activity of the enzyme preincubated at 0°C was taken as 100%. The data are averages from two independent experiments and vary within 10%.