TABLE 3.

Methylmercury concentration and production rates from inhibition assays

Strain	Absolute concn (pM MeHg)a		Specific rate (pM MeHg h−1)a,b		Specific normalized rate (pmol of MeHg h−1 cell−1)a,c
	Assay	+CHCl3	Assay	+ CHCl3	Assay	+ CHCl3
D. multivorans 1be1	340.0 ± 84.3	115.5 ± 32.9	44.5 ± 16.9	<DLd	4.2 × 10−9 ± 1.6 × 10−9	NGe
D. propionicus 1pr3	332.2 ± 36.6	274.3 ± 62.0	53.1 ± 7.3	41.5 ± 12.4	4.7 × 10−9 ± 1.1 × 10−9	3.9 × 10−9 ± 1.5 × 10−9
D. africanus (7-hr incubation)	373.3 ± 140.4	495.2 ± 54.5	64.4 ± 28.1	88.8 ± 10.9	5.6 × 10−10 ± 2.3 × 10−10	6.2 × 10−10 ± 1.8 × 10−10
D. africanus (3 day incubation)	220.6 ± 100.2	190.9 ± 66.3	42.4 ± 22.0	36.4 ± 15.7	1.5 × 10−10 ± 7.9 × 10−10	2.3 × 10−10 ± 9.3 × 10−10

^aValues are average ± standard deviation of three replicate 5-h Hg assays.

^bSpecific rates were corrected for average blank MeHg concentration.

^cNormalized to total cell density at end of assay.

^dAverage assay detection limit (DL) = 6.2 pM MeHg h⁻¹ (n = 10). There was a high average blank (117.4 pM MeHg h⁻¹) because of estuarine medium.

^eNG, no growth.