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. Author manuscript; available in PMC: 2019 Sep 1.
Published in final edited form as: Res Microbiol. 2018 Feb 16;169(7-8):351–356. doi: 10.1016/j.resmic.2018.02.002

Fig. 1.

Fig. 1

Schematic representation of drug fluxes across the two-membrane cell envelopes of Gram-negative bacteria and the mathematical model that describes this permeability barrier. Modified from [50].