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Competition assay with C6-HSL and quorum-sensing inhibitors of prodigiosin production in S. marcescens AS-1. AS-1 was cultivated with 5 μM C6-HSL and various concentrations of C9-CPA or halogenated furanone. Intracellular prodigiosin was extracted after 20 h of cultivation. The results were reproduced in three experiments, and the error bars indicate standard deviations.
