Fig. 5From: Engineering Lactococcus lactis as a multi-stress tolerant biosynthetic chassis by deleting the prophage-related fragmentComparison of the nisin yield of L. lactis N8 and L. lactis N8-1. a Nisin yield at pH 6.0; b Nisin yield at pH 5.5; c Nisin yield at pH 5.0; d Nisin yield of the wild-type and mutant strains by overexpressing nisZBack to article page