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. 2014 Aug 1;289(38):26464–26473. doi: 10.1074/jbc.M114.585869

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© 2014 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 4. — Influx rates (V_in) of ampicillin and benzylpenicillin in LA51A ΔompF (A) or ΔompC (B) in the presence of ethanol or urea at given concentrations. C_o is the substrate concentration used in the assay. The assay was conducted with 5 mm (open bars) or 50 mm (filled bars) potassium/phosphate buffer (pH 7.0) containing 5 mm MgCl₂. Data represent averages of quadruplicate measurements with standard deviations. Asterisks show the presence of statistically significant changes (p < 0.05 according to Student's t test) in comparison with the data with no additives.