Skip to main content

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 (%)  
5 mM 10 mM 15 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