Figure 3From: Characterization of mercury bioremediation by transgenic bacteria expressing metallothionein and polyphosphate kinaseMercury bioremediation assay. Growth of untransformed E. coli bacteria in media without HgCl2, with 120 μM HgCl2, and in treated medium was measured after a 16 hours culture period at 37°C. The untransformed bacteria was inoculated to an initial absorbance of 0.01. Treated medium was LB culture media that was initially amended with 120 μM HgCl2, inoculated with mt-1 transgenic bacteria, and allowed to grow for 120 hours. After the 120 hours, the mt-1 transgenic bacteria was removed from the LB media by centrifugation and filter sterilization. Growth was determined by measuring absorbance at 600 nm.Back to article page