Table 2.

Heavy Metals effect on NR activity.

Heavy metal	concentration	Relative activity (%)
Fe 3+	1 mM	101.09
	2.5 mM	92.73
	5 mM	72.07
	10 mM	53.16
Fe 2+	1 mM	100.57
	2.5 mM	94.55
	5 mM	93.09
	10 mM	56.95
Ag +	1 mM	10.18
	2.5 mM	4
	5 mM	0
	10 mM	0
Mn 2+	1 mM	72.72
	2.5 mM	70.76
	5 mM	55.93
	10 mM	37.31
Hg 2+	1 mM	12.43
	2.5 mM	4.8
	5 mM	1.45
	10 mM	0
Zn 2+	1 mM	98.88
	2.5 mM	72.73
	5 mM	59.56
	10 mM	45.24
Co 2+	1 mM	66.25
	2.5 mM	58.98
	5 mM	51.13
	10 mM	37.67
Ni 2+	1 mM	64.68
	2.5 mM	52.92
	5 mM	49.11
	10 mM	32.92
Cr 3+	1 mM	45.52
	2.5 mM	40.73
	5 mM	22.69
	10 mM	7.93
Cu 2+	1 mM	100.4
	2.5 mM	93.82
	5 mM	78.55
	10 mM	49.67
Cd 2+	1 mM	9.96
	2.5 mM	3.27
	5 mM	0
	10 mM	0
Pb 2+	1 mM	53.09
	2.5 mM	48.22
	5 mM	35.42
	10 mM	13.24