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. 2005 Aug;187(15):5156–5165. doi: 10.1128/JB.187.15.5156-5165.2005

FIG. 5.

FIG. 5.

CE-MS and CE-MS/MS (positive-ion mode) analysis of delipidated LPSs from H. pylori SS1::HP0479kan, 26695::HP0479kan, and O:3::HP0479kan mutants. Separation conditions: 10 mM ammonium acetate containing 5% methanol, pH 9.0, 25 kV. (A) Extracted mass spectra at 14.6 min for strains SS1::HP0479kan, 26695::HP0479kan, and O:3::HP0479kan. (B) Tandem mass spectrum of precursor ions at m/z 1392. (C) Tandem mass spectrum of precursor ions at m/z 1612. Separation conditions were as for panel A except nitrogen collision gas, Elab: 60 eV (laboratory frame of reference).