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Table 3 Effect of metal ions on PcβGlu1 and PcβGlu2 activities

From: Penicillium citrinum UFV1 β-glucosidases: purification, characterization, and application for biomass saccharification

  Residual activity (%)
PcβGlu1 PcβGlu2
Control 100 ± 5 100 ± 2
NaCl 106 ± 6 101 ± 3
NaNO3 101 ± 5 100 ± 10
KCl 110 ± 2 90 ± 10
CuSO4 29.6 ± 0.4 1.68 ± 0.03
BaCl2 13.2 ± 0.2 0.8 ± 0.2
MgCl2 110 ± 10 63 ± 3
CaCl2 88 ± 1 86 ± 5
ZnCl2 91 ± 2 22 ± 3
HgCl 56 ± 3 0.55 ± 0.01
Pb(NO3)2 1.2 ± 0.1 3 ± 1
NH4Cl 108.4 ± 0.2 100 ± 20
MnCl2 72 ± 2 60 ± 10
CoCl2 78 ± 1 72 ± 9
FeCl3 0.32 ± 0.05 0.54 ± 0.05
  1. Enzymes were incubated at 40 °C for 30 min in the presence of ions and residual activity was measured with MUβGlu as a substrate