Fig. 2From: CtcS, a MarR family regulator, regulates chlortetracycline biosynthesisThe construction and phenotypic characterization of mutant strains. a Schematic construction of ∆ctcS mutant. b HPLC profile of CTC and TC accumulation in different strains. c Growth curve of ∆ctcS mutant and WT strains. d Cell growth was measured in cell dry weight. Three clones were selected and the error bars showed the standard deviation of three independent experiments of the selected clones in b, c and dBack to article page