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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