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Effects of serum on the antibacterial activity of PBD-1 peptides. The results of CFU assays with E. coli ATCC 35218 are shown as the means and standard errors of triplicate determinations. T0 and T3h are as in Fig. 7. Bacteria in experimental groups were incubated with different concentrations of PBD-142 (circles) or PBD-138 (triangles) in the presence (solid symbols) or absence (open symbols) of 2% serum (S).
