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Impact of mutations in teichoic acid biosynthesis gene tagO and the ica operon on the activity of Dpo7 as determined by the diffusion assay. The protein (40 μL from an 800 μg/mL stock) or buffer alone were, respectively, added to the right and left well. Activity was observed as a turbid halo around the well. The strains used were V329-BIM1 (A), SA113 (B) and SA113-ica (C).
