Table 2 Effect of metal ions on the activity of purified P. americana protease
From: Characterization of a chemostable serine alkaline protease from Periplaneta americana
Metal ion | Relative activity (%) | Â | |
|---|---|---|---|
5Â mM | 10Â mM | 15Â mM | |
Control | 100 | 100 | 100 |
Ca2+ | 95 | 94 | 80 |
Zn2+ | 95 | 84 | 80 |
Cu2+ | 95 | 75 | 80 |
Ba2+ | 94 | 93 | 82 |
Hg2+ | 97 | 90 | 80 |
Na2+ | 92 | 82 | 83 |
K+ | 92 | 84 | 85 |