Fig. 3
From: Adsorption of Hg2+/Cr6+ by metal-binding proteins heterologously expressed in Escherichia coli
Effect of Hg2+ or Cr6+ concentrations on the adsorption capacity of engineered strains. The colored lines indicate engineered strains, and the black lines indicate the wild-type BL21. a Mercury adsorption strains; b Chromium adsorption strains; c and d Mixture of strains M’-002 and B-008. All data shown are the mean ± SEM of three independent experiments