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Schematic representation of bioreactor/recovery loop used for biotransformation. (a) Two-step bioreactor/recovery loop used for biotransformation of 3-nitrophenol to 3-nitrocatechol by strain P. putida F1. (b) Single- step bioreactor/recovery loop used for biotransformation of toluene to 3-methylcatechol by E. coli expression clone (pDTG602).
