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Effect of fusaric acid on the expression of a chromosomal hcnA′-′lacZ fusion in the P. fluorescens CHA0 derivative CHA207. Specific β-galactosidase activities were determined for bacteria grown in OSG liquid culture medium at 30°C without (□) or with (▪) fusaric acid (500 μM). OD600 values for cultures grown in the absence (▵) and presence (▴) of fusaric acid are shown. Values are means ± standard deviations from three experiments. Some of the error bars are too small to be shown.
