Minimal inhibitory concentrations (MIC).

<p>MIC₅₀ was defined as the lowest concentration of the stressor that reduced bacterial growth by >50% in mid exponential growth. Results show average of independent triplicate experiments, no variation was observed. Only the stressors towards which the MIC₅₀ of one or more of the mutants deviated from that of the wild type are indicated. AU = arbitrary units.</p><p>*1 AU was defined as the bacteriocin concentration necessary for 50% inhibition of growth of <i>E. faecalis</i> TX5179 in mid exponential growth (OD₆₀₀ ∼ 0.4 for untreated cells).