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. 2007 Mar 23;189(11):3996–4013. doi: 10.1128/JB.00185-07

FIG. 2.

FIG. 2.

LC-MS traces of extracts from the IDM culture supernatants and cell lysates of B. anthracis Sterne and the ΔsodA1 and Δbac mutants, showing the presence of bacillibactin or petrobactin. (A and B) SIM chromatograms of intracellular (A) and extracellular (B) bacillibactin at the mass range of m/z 883.2 [M+H]+. Peaks at 19.230 to 19.340 min represent bacillibactin. (C) SIM chromatogram of extracellular petrobactin at the mass range of m/z 719.3 [M+H]+. Peaks at 15.860 to 16.134 min represent petrobactin. PQ, paraquat-treated medium.