Fig. 5.
Effect of nisin O genes on immunity to nisin. Growth of L. lactis strains FI5876 (X), and MG1614 with plasmids pIL253 (□), pnso (▲) or pnsoΔnsoA (●) in selective medium supplemented with 1 µg ml−1 nisin A. Results are the mean of triplicate samples±sd