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PepN, PepI, and PepX activities of seven lactic acid bacteria strains on Leu-p-nitroanilidies, Pro-p-nitroanilidies, and Gly-Pro-p-nitroanilidies substrates, respectively. (I) and (E) indicate intracellular and extracellular enzyme activities, respectively. Bars that do not share a common lowercase letter differ significantly (p < 0.05) (n = 3).
