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Table 3 Effects of metal ions on Arthrobacter sp. 22c L-arabinose isomerase activity

From: A method for the production of D-tagatose using a recombinant Pichia pastoris strain secreting β-D-galactosidase from Arthrobacter chlorophenolicus and a recombinant L-arabinose isomerase from Arthrobacter sp. 22c

Concentration of metal ions   Relative activity (%)  
  1 mM 5 mM 10 mM
None 100 100 100
Ca2+ 109 ± 1.8 105 ± 2.2 94 ± 1.2
Co2+ 94 ± 1.5 90 ± 0.2 82 ± 0.1
Mg2+ 110 ± 0.3 109 ± 0.1 110 ± 1.0
Mn2+ 106 ± 6.5 105 ± 0.2 105 ± 0.1
Ni2+ 81 ± 0.4 76 ± 0.3 70 ± 0.4