Additional file 1: of Using the promoters of MerR family proteins as “rheostats” to engineer whole-cell heavy metal biosensors with adjustable sensitivity

Figure S1. The relationship between RFP expression levels (log values). with thermodynamic model predicted expression levels (A) or with LacZ expression levels (B). Figure S2. The growth rates (OD values after 2 h incubation) of CadR biosensors (A) and MerR biosensors (B). No significant difference was observed. Figure S3. (A) Biosensor P429-merR incubated with 0.25 μmol/L of Hg (II) or other metal ions. (B) Biosensor P429-merR co-incubated with 0.25 μmol/L of Hg (II) and 0.25 μmol/L interference ions. (DOCX 544 kb)