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Production and growth of P. putida S12TPL3 (A), P. putida S12TPL3r (B), P. putida STΔhpd (C), and P. putida STΔphhA (D). □, cell dry weight; ▪, phenol concentration; ▴, estimated 4-hydroxyphenylpyruvate (hpp) concentration. The profiles for strains STΔpobA and STΔhpd were similar; therefore, only results for STΔhpd are presented here. Cultures were performed in triplicate in mineral salts medium with 10 mM glucose as the carbon source. The variation between replicates was less than 10%.
