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Effect of iron and hemin on the inhibitory activity of GaPPIX. Strains were grown in MHB supplemented or not with GaPPIX at the MIC. Hemin and FeCl3 were supplied at different concentrations, either alone or in combination with GaPPIX, as indicated. (A) S. aureus ATCC 25923, ATCC 43300, Sau117, UD95, and (B) A. baumannii strains ATCC17978, AYE, ACICU and C13–373. OD600 was monitored periodically for up to 24 h. Data are the mean ± standard deviation of triplicate experiments.
