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Plasmid R27 compensates for some hns-induced phenotypes. (A) Growth at low temperature of strains 5K (squares), 5K hns (circles), 5K hns(R27) (triangles), and 5K hns(R27 hns) (diamonds). (B) Hemolytic activity in culture supernatants of the mutant and WT strains transformed with hemolytic plasmid pANN202-312. The hemolytic activity of strain 5K hns(pANN202-312), referred to as 100%, was 1,327 U. OD600 nm, optical density at 600 nm.
