Table 1.

Effect of metal ions on β-N-acetyl hexosaminidase from strawberry

Metal ions	Relative activity (%) β-Hex1	Relative activity (%) β-Hex2
Control	100	100
Na+	76.5 ± 1.99**	70.8 ± 0.18**
Mg2+	65.96 ± 0.66**	78.3 ± 0.57**
Ca2+	67.0 ± 0.07**	100.7 ± 0.72NS
Fe2+	82.7 ± 2.47**	105.5 ± 0.26*
Zn2+	13.5 ± 0.17**	26.4 ± 0.06**
Cu2+	13.48 ± 0.36**	54.2 ± 1.28**
Mn2+	108.5 ± 0.11**	116.4 ± 0.45**

Data represent the means ± SE (Standard Error). β-Hex activity was relative to the control (100%). The * and ** represent means significantly different according to T test at P < 0.05 and P < 0.01 level, respectively and ^NS mean not significant