Fig. 2

CdS intracellular biosynthesis in E. coli. A Bacterial pellets exposed to UV light (365 nm) of indicated E. coli strains grown on M9-glucose medium supplemented with 60 μg/ml CdCl₂ or without metal (control) after 14 h at 37 °C. B Representative fluorescence microscopy images of cells from metal-exposed pellets after 14 h at 37 °C of BW25113 strain (a, b), ΔminC (c) and ΔminCDE (d). Fluorescence images were captured after excitation with a 330–380 nm filter