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Effect of combined compounds on antimicrobial activity. Effect of PLA (0.5 g/l) and PAA (1 g/l) alone and combined (A), and effect of the diketopiperazine cPM (1 g/l) and PLA (0.5 g/l) alone and combined (B) on the growth of S. aureus. (C) Effect of ampicillin (10 mg/l) and cPM (100 mg/l) alone and combined on the growth of S. aureus MRSA strain B335466. Data are presented as mean values ± standard deviations of three biological replicates performed in triplicate.
