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Shown are the L. lactis strains: NZ9000Erm, NZ9000NisI and NZ9000NisIΔ22 strain. IC50 determination of different strains (B). Growth inhibition experiments were performed with nisin using different strains. Black line: NZ9000Erm strain; blue line: NZ9000NisI strain; red line: NZ9000NisIΔ22 strain. Data was fitted and evaluated according to equation (1). Each experiment was performed at least in triplicates.
