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Accumulation of ciprofloxacin (final concentration of 10 μg/ml) by (A) HL06 and HL06CIP4 and (B) HL06CIP4 and HL06CIP4Δlde. Reserpine (final concentration of 20 μg/ml) was added at the time indicated by the arrow. Data shown are the mean of three experiments. Error bars show the standard deviation.
