Table 2.

Effect of metal ions on A. niger NRC114 α-galactosidase activity

Metal salt	Relative activity (%)
	2.5 mM	10 mM
Control	100.00 ± 0.00	100.00 ± 0.00
MnCl2	25.88 ± 0.003	43.29 ± 1.54
HgCl2	12.78 ± 0.06	14.68 ± 0.49
CaCl2	101.62 ± 1.98	ND
KCl	114.39 ± 0.00	86.68 ± 0.23
MgSO4	123.46 ± 3.14	101.90 ± 1.56
CoSO4	128.99 ± 0.67	95.07 ± 0.004
ZnSO4	111.87 ± 2.55	116.57 ± 2.67
CuSO4	93.73 ± 0.53	22.69 ± 0.37
EDTA	104.37 ± 0.88	101.55 ± 1.92

ND Not determined