SDS-Tricine-PAGE gels of the wild-type nalidixic acid-resistant A450 strain (lane 1); LPS core mutants A450ΔWaaL, A450ΔWahBlike, A450ΔORF2, and A450ΔWahDlike (lanes 2 to 5, respectively); and these LPS core mutants complemented with pBAD33-Gm-WaaL, pBAD33-Gm-WahBlike, pBAD33-Gm-ORF2, or pBAD33-Gm-WahDlike, respectively (lanes 6 to 9, respectively). The strains with pBAD33-Gm plasmids were grown under induced conditions.