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Expression of arsK was induced by As(III), Sb(III), Rox(III), MAs(III), and As(V) in strain GW4. Strain GW4 containing the expression plasmid pLSP-arsR2-arsK was cultured in MMNH4 medium with or without the addition of As(III) (A), Sb(III) (B), Rox(III) (C), MAs(III) (D), As(V) (E), or dimethyl-As(III) (F). The data are the means from three replicates.
