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Bactericidal kinetics of P28 (A), P14 (B), and NC12-P14 (C) against E. coli O157:H7. Bacteria were incubated at 37°C in the presence of various peptide concentrations (0, 2, 4, 8, and 16 μM, represented by the open circles, asterisks, rectangles, closed circles, and triangles, respectively) in LB medium. Plotted are mean CFU values ± standard deviations obtained from two independent experiments performed in duplicates. Zero CFU indicates negative cultures.
