Production and Characterization of Alkaline Protease from a High Yielding and Moderately Halophilic Strain of SD11 Marine Bacteria

Figure 4

The effect of protease activity (a) and stability (b) by pH from strain SD11. (a) The enzyme activity was tested in different pH buffer solutions at 40°C. The enzyme activity was maximum at pH 10.0 regarded as 100%. (b) The protease stability against pH was examined after the enzyme was incubated in advance in different pH buffer solutions for 1 h at 40°C. The residual enzyme activity was tested at 40°C and pH 10.0. The enzyme activity without incubating was regarded as 100%. Each point indicates the average value of three times, and error bars show standard deviation.

(a)

(b)