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Table 1 Effect of various metal ions on hydrolytic activity of BsKER71

From: Recombinant expression and biochemical characterization of a novel keratinase BsKER71 from feather degrading bacterium Bacillus subtilis S1-4

Metal ions Concentration (mmol/L) Hydrolytic activity of different substrate
Casein (%) Keratin (%)
CK 0 100.00 100.00
Zn2+ 2 97.00 95.48
Co2+ 2 93.73 92.70
Mg2+ 2 114.73 112.13
Ca2+ 2 116.64 115.81
Mn2+ 2 94.71 89.45
Ni2+ 2 95.36 94.21
Cu2+ 2 2.78 1.14