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TLC analysis on C18-reverse phase TLC plates chromatographed in methanol/water (60:40, v/v) and visualized with C. violaceum CV026. Arrows indicate the positions of AHL standards run on the same plate. Lane A: C6-HSL (0.1 μg/μL) and C8-HSL (5 μg/μL). Lane B: Extract of the spent culture supernatant of A9.
