Fig. 4. Salt sensitivity of antimicrobial peptides against E. coli and P. aeruginosa.

Bacterial suspensions in 10 mM NaPi (pH 6.8) with various concentrations of NaCl (0 to 150 mM) were treated with AG (25 μg/ml) or LL37 (1 μg/ml). Bacterial survival is expressed as a percentage, as noted in Figure 1. The data are shown as the mean ± standard deviation of three independent experiments. Significantly different from control, nontreated bacterial cells (Student’s t-test: * P < 0.05, ** P < 0.01).