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PM analysis of wild-type E. coli K-12 and its rpoZ-defective mutant. PM assay was performed for the combination of E. coli wild-type BW25113 and its rpoZ-deleted mutant JW3624 according to the standard procedure (86, 87). A typical pattern of the cell growth of the whole set of 20 PM plates is shown. The growth curve for wild type is shown in green, while that of the rpoZ mutant is shown in red. Differences in the growth rate were observed under several culture conditions as indicated.
