Fig. 4
From: Adsorption of Hg2+/Cr6+ by metal-binding proteins heterologously expressed in Escherichia coli
Adsorption performance of engineered strains in mixed metal ion solutions containing Cr6+, Hg2+, Cd2+, and As3+ at different concentrations. a Mercury adsorption strains; b Chromium adsorption strains; c Mixture of strains M’-002 and B-008. The mixed metal ion concentrations were set to 160, 400, and 800 μM, respectively. All data shown are the mean ± SEM of three independent experiments