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Representative chromatograms obtained during the analysis of indolic compounds in P. putida strain A culture supernatants. Chromatogram on the top shows the separation of P. putida strain A culture supernatant after 72 h of growth in King B medium supplemented with 3.5 mM Trp. Chromatogram on the bottom shows the separation of a sterile King B medium supplemented with 3.5 mM Trp (control)
