175012.fig.004
Figure 4: Proteolytic activity of crude enzymes produced by B. amyloliquefaciens MA20 and B. subtilis MA21 using gelatin as substrate and both of Coomassie blue and amido black stains. Blue plate stained with Coomassie blue while green plate stained with Amido black. The well (1) refers to enzymes produced by B. amyloliquefaciens MA20, (2) refers to enzymes produced by B. subtilis MA21, and (3) is inactive enzyme.