FIG. 1.

Effects of salinity on antimicrobial activities of halocidin congeners, P18, and melittin against P. aeruginosa (MDRPA) and E. faecium (VRE) in radial diffusion assay. Different concentrations of NaCl were added to underlay agars which contained 9 mM sodium phosphate, 1 mM sodium citrate buffer, 1% (wt/vol) agarose, and 0.3 mg of TSB/ml. The diameters of the clear zones are displayed in units (10 U = 1 mm). The antimicrobial activities were graphed against log concentration of peptides. Mean values were obtained from tests repeated three times.