Fig. 1

Cytotoxicity of (a) nisin, (b) lysozyme and (c) lactoferrin after 5 days of incubation (MTT assay). Cell viability expressed as the percentage of control (untreated) cell viability. Nisin concentrations in μg/mL, lysozyme and lactoferrin concentrations in mg/mL. All data expressed as means ± SD (standard deviation) for n = 3 independent experiments. Asterisks refer to statistically significant differences between control and treatments at: ** p<0.01, *** p<0.001