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Gallic acid (GA) metabolism in resting cells of L. plantarum. Gallic acid (2 mM) was added to washed cells of L. plantarum WCFS1 or its gacP knockout mutant (WCFS1ΔgacP) grown in MRS medium supplemented with 3 mM gallic acid. The gallic acid and pyrogallol (PG) present in the supernatants after 15 (A), 30 (B), or 60 (C) min of incubation were detected by HPLC analysis. Chromatograms were recorded at 280 nm.
