LPS from mesophilic Aeromonas strains. LPS samples from wild-type rifampin-resistant strains of serotypes O1, O2, O18, and O34 (lanes 1 to 4, respectively), gne insertional mutants constructed with pSF-GNE plasmid from strains O1, O2, O18, and O34 (lanes 5 to 8, respectively), and gne mutants from strains O18 and O34 complemented with plasmid pACYC-GNE (lanes 9 and 10, respectively) are shown.