A: SDS-PAGE of bacterial isolates intracellularly with arsenite and without arsenite in the culturing medium. On right hand side is marker a line (M), next to it, control sample of 3.1S (C) and 3.1S (T). Treated sample have the arsenite in the medium and represented with (T) while control does not have arsenite in the medium and marked with (C). B: Agarose gel (1%) is showing the amplified product of arsenite oxidase gene from B. cereus 3.1S. Lane marker and 3.1S is showing DNA marker and B. cereus, respectively.