FIG. 2.

Effect of salt on the antimicrobial activity of cathelicidin-derived peptides. P. aeruginosa PAO1 was incubated with the indicated concentrations of antimicrobial peptide in the standard assay buffer at low salt or at high salt. Luminescence was measured after 5 h. Values are percentages of control in the absence of antimicrobial peptide; controls were determined for each salt concentration. Symbols indicate mean and range (n = 2); in most cases, the error bars are covered by the symbol.