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Table 2 Effects of metal ions and chemical reagents on esterase activity

From: Purification and characterization of an extracellular esterase with organic solvent tolerance from a halotolerant isolate, Salimicrobiumsp. LY19

Substances Concentration (mM) Residual activity (% ± SD)
Control - 100
Ca2+ 5 138.9 ± 1.6
Zn2+ 5 97.6 ± 0.8
Fe2+ 5 92.7 ± 1.7
Fe3+ 5 91.8 ± 0.9
Cu2+ 5 80.8 ± 1.8
Mn2+ 5 97.5 ± 1.6
Hg2+ 5 18.4 ± 0.4
Mg2+ 5 97.7 ± 1.3
EDTA 1 8.9 ± 0.2
PMSF 1 11.1 ± 0.2
DEPC 1 92.1 ± 1.1
PAO 1 8.4 ± 0.3
β-mercaptoethanol 1 91.3 ± 1.5
  1. Residual activity was determined as described in “Methods” and expressed as the percentage of the control value (without any additives). Values are expressed as the averages of three independent experiments ± standard deviations.