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. 2010 Nov 7;9:83. doi: 10.1186/1475-2859-9-83

Table 3.

Effect of metal ions on esterase activity

Compounds Concentration (mM) Relative activity (%)
Control 0 100.0 ± 2.9
CoCl2 5 126.4 ± 2.1
K2SO4 5 103.2 ± 3.6
FeSO4 5 100.9 ± 2.6
CuCl2 5 7.8 ± 2.7
Ni(NO3)2 5 36.2 ± 4.3
EDTA 5 102.7 ± 3.2
FeCl3 5 10.9 ± 3.4
CaCl2 5 104.1 ± 3.7
ZnCl2 5 23.7 ± 1.8
MgCl2 5 79.7 ± 2.6

Activity without metal ions was set as 100% (4,897 U/ml). All measurements were repeated three times.