Fig. 5
From: Adsorption of Hg2+/Cr6+ by metal-binding proteins heterologously expressed in Escherichia coli
Comparison of the adsorption rates of four engineered strains in the adsorption of single and mixed ions. The solid lines indicate adsorption of single ions, and the dashed lines indicate adsorption of mixed ions. a The mercury ion adsorption rates of M'-002 and M'-006 in single and mixed ion solutions; b The chromium ion adsorption rates of B'-002 and B-008 in single and mixed ion solutions