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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