GAPDH and ArsJ reduce cellular As(V) accumulation. Uptake of arsenicals by E. coli AW3110 carrying either vector plasmid pUC19 (filled symbols) or pGAPDH_ArsJ (open symbols) was assayed with 20 μM, final concentration, of the indicated arsenicals. (Δ,▲) As(V), (○,●), As(III), (□,■) MAs(III), was performed as described in Experimental procedures. Data are the mean±SE (n=3).