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Induction of the tdh promoter in clinical and environmental strains. Promoter activity of a tdh::gfp promoter fusion harbored in trans in a low-copy-number plasmid is presented as relative fluorescence (fluorescence/OD600) for various strains during maximal production (OD600 ∼ 1.0) as determined from time course assays for cultures grown at 37°C.
