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Uptake of progesterone by marR1 strains when exposed to substrate cocktails containing seven AcrAB-TolC pump substrates at or slightly below MICs for AG102. Cocktail treatment resulted in statistically significant changes in uptake (as assessed by the Wilcoxon rank sum test) over respective nontreated control levels. Error bars indicate standard deviations. −, absence of; +, presence of.
