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Activity of nisin V (M21V), nisin T (K22T), nisin S (K22S) and wild-type nisin A against a cohort of pathogenic mycobacteria. Efficacy was evaluated using alamar blue colorimetric indicator dye. The dye reduction value of nisin A was taken as 100% relative growth, facilitating direct comparison of nisin A to the activity of nisin V, nisin T and nisin S.
