Panel A, strains included in the initial part of this study. 1, S. Enteritidis 147. 2, S. Enteritidis 147 rfaL mutant. 3, S. Typhimurium LT2. 4, S. Typhimurium LT2 rfaL mutant. 5, S. Infantis 1516. 6, S. Infantis 1516 rfaL (I) mutant. Lane M, molecular weight standard. This analysis was repeated 3 times for each strain or mutant with similar results in each of the replicates. Panel B, strains included in the second part of this study. 1, S. Enteritidis G1481. 2, S. Typhimurium 2002. 3, S. Typhimurium 2454. 4, S. Infantis 514. 5, S. Infantis 1516 rfaL (II) mutant. 6, S. Infantis 1516 rfaL (III) mutant. Lane M, molecular weight standard. This analysis was repeated 3 times for each strain or mutant with similar results in each of the replicates.