Fig. 4
From: Optimized expression of Hfq protein increases Escherichia coli growth
Cell density and growth rate of various E. coli strains harboring an hfq variant. The six hfq variants were introduced into the five wild-type E. coli strains and their relative increases of growth rate (a) and cell density (b) are shown. The relative values denote the percent increase or decrease compared with respective control cells harboring no hfq variants. * denotes p-value < 0.05 and ** denotes p-value < 0.0001