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Table 4 Effects of metal ions on protease

From: Development of a microbial protease for composting swine carcasses, optimization of its production and elucidation of its catalytic hydrolysis mechanism

Metal ion

Relative activity (%)

1 mM

5 mM

Fe3+

76.78 ± 1.89

12.36 ± 0.86

Li+

93.29 ± 1.56

88.25 ± 2.12

Fe2+

73.50 ± 2.36

43.46 ± 3.48

Mg2+

96.97 ± 1.70

81.82 ± 2.30

Ag+

72.56 ± 1.62

12.31 ± 1.87

Cu2+

42.74 ± 3.14

17.33 ± 3.08

Co2+

70.82 ± 0.43

27.64 ± 0.68

Mn2+

99.54 ± 2.91

155.87 ± 1.78

Ca2+

96.06 ± 2.30

45.30 ± 5.10

Hg2+

24.36 ± 1.10

11.28 ± 0.52