Figure 5. Influence of As(III) on the expression of aioA, mcp and chemotaxis related genes.

(A) Expression of aioBA::lacZ in strains GW4, GW4-∆aioR and GW4-∆mcp in MMNH₄ medium with or without the addition of 1 mM As(III). (B) Expression of mcp::lacZ in strains GW4, GW4-∆aioR and GW4-∆mcp in MMNH₄ medium with or without the addition of 1 mM As(III). (C) Expression of cheA, cheY2 and fliG genes detected by qRT-PCR in different strains in MMNH₄ medium with or without the addition of 1 mM As(III). Data are shown as the mean of three replicates, with the error bars illustrating one standard deviation. The statistical significance is represented by stars (**p < 0.01).