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Table 3 Effects of metal ions on the activity of CmChi1

From: Molecular characterization of a novel chitinase CmChi1 from Chitinolyticbacter meiyuanensis SYBC-H1 and its use in N-acetyl-d-glucosamine production

Metal ion

Chemical

Concentration (mM)

Relative activity (%)

No addition

None

0

100

Ca2+

CaCl2

10

94.4 ± 3.0

Co2+

CoCl2

10

62.2 ± 1.4

K+

KCl

10

115.4 ± 2.1

Cu2+

CuCl2·2H2O

10

17.3 ± 0.8

Mg2+

MgCl2

10

90.5 ± 2.6

Zn2+

ZnCl2

10

45.3 ± 1.1

Al3+

AlCl3

10

0

Mn2+

MnCl2

10

80.6 ± 2.9

Ag+

AgCl

10

16.7 ± 0.9

Ba2+

BaCl2

10

115.7 ± 0.2

Fe2+

FeCl2

10

31.6 ± 1.0

Na+

NaCl

10

113.7 ± 1.8

Ni2+

NiCl2

10

61.5 ± 2

EDTA

EDTA

10

102.1 ± 2.7