Table 2.

Effect of divalent ions and chelating agents on β‐glucosidase activity. Values are means ± SD for three different experiments

Metal ion	Relative activity (%)a
	2.5 mm	5.0 mm	10.0 mm
None	100 ± 0.2	100 ± 0.2	100 ± 0.2
Ca2+	99 ± 1.9	99 ± 1.6	97 ± 1.1
Co2+	99 ± 2.9	96 ± 4.9	94 ± 1.8
Cu2+	93 ± 4.0	96 ± 5.5	93 ± 5.8
Fe2+	72 ± 1.6	40 ± 1.3	19 ± 2.4
Mg2+	95 ± 5.1	94 ± 0.6	96 ± 1.3
Mn2+	98 ± 1.8	97 ± 2.1	95 ± 4.2
EDTA	98 ± 2.2	98 ± 1.5	96 ± 3.0
EGTA	95 ± 3.5	97 ± 4.5	97 ± 3.9

^a100% activity corresponds to 0.801 nmol·min⁻¹·mg⁻¹ protein.