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HPLC chromatographs of culture filtrates during aerobic indole degradation by Arthrobacter sp. strain B1 and Alcaligenes sp. strain B5. Standard chemicals of catechol, isatin, 2-oxindole, and indole (a), Arthrobacter sp. strain B1 (b), and Alcaligenes sp. strain B5 (c). At the panel A, two wavelengths (243 nm and 271 nm) in the PDA detector were used to show chromatographs of four standard chemicals
