Table II.

Relative Hg(0) volatilizing activity of plants expressing wild-type or modified MerB proteins

Plant Line	Hg(0) Volatilization	Normalized [MerB]	Specific Activity	Specific Activity Relative to Line AB-5
	ng Hg(0) min−1 g−1		ng Hg(0) min−1 g−1 [MerB]
AB-1	785	4.00	209	0.8
AB-5	260	1.00	250	1.0
CW-2	408	0.14	2,914	12
ER-1	167	0.01	16,700	67
ER-2	763	0.13	5,869	23
ER-3	249	0.03	8,300	33

See Figure 3 for mercury volatilization rate and units and Figure 4 for relative protein levels. The relative specific activities were obtained by dividing the volatilization rate by the relative protein level.