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Table 2 Effects of metal ions on Arthrobacter sp. 32c β-D-galactosidase activity.

From: A new cold-adapted β-D-galactosidase from the Antarctic Arthrobacter sp. 32c – gene cloning, overexpression, purification and properties

Metal ion

Relative activity [%]

None

100

Na+

97 ± 3

K+

100 ± 2

Ni2+

38 ± 4

Mg2+

90 ± 2

Fe2+

25 ± 2

Co2+

87 ± 3

Cu2+

0 ± 0

Mn2+

11 ± 2

Zn2+

0 ± 0

Ca2+

88 ± 2