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(A) CAS agar phenotypes of the WT and ΔywjA mutant. (B) HPLC traces of BB secreted in iron-limited cultures of WT and ΔywjA mutant strains after 10 hours of growth. UV detection was done at 215 nm, and compound identity was confirmed by subsequent MS analysis. After background subtraction, peaks were integrated for quantitative determination of BB secretion.
