Fermentations of P. putida KT2440 and deletion strains with coniferyl alcohol 5 mM as the sole carbon source. (A) OD620 measurements of P. putida KT2440 (blue diamonds), P. putida KT2440 ΔPP_3839 (red squares), and P. putida KT2440 ΔPP_2426 (green triangles). (B) HPLC-determined concentration of coniferyl alcohol with P. putida KT2440 (dark-blue diamonds), P. putida KT2440 ΔPP_3839 (red squares), and P. putida KT2440 ΔPP_2426 (green triangles) and concentration of ferulate detected with P. putida KT2440 (purple crosses), P. putida KT2440 ΔPP_3839 (light-blue line), and P. putida KT2440 ΔPP_2426 (orange circles). Experiments were performed in duplicate, and the standard deviations are displayed with error bars.