Additional file 7: of Identification of enhanced hydrogen and ethanol Escherichia coli producer strains in a glycerol-based medium by screening in single-knock out mutant collections

Figure S4. Cell dry weight (CDW) curves in g/L of the multiple mutants: ldhAgnd::kan (M2) (filled square); ldhAgndfrdBC::kan (M4) (filled diamond); ldhAgndfrdBCtdcE::kan (M5) (filled inverted triangle); the single mutants: gnd (open circle) and tdcE (open square) and the wild type strain (open diamond)