Figure 1: The levels of accumulation of 4,6-diamidino-2-phenylindole in three planktonic cultures of AcrAB-tolC positive clinical isolates of E. coli in the absence (0 mM) and presence of various concentration of EDTA (2,4,6,8, 9,10 and 11 mM). Results are presented in mean ± SD of three independent experiments.