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LPS phenotypes of SAL1 and SAL2 and complementation of SAL1. (A) Disruption of hldA results in LPS with a smaller core and no O antigen, and disruption of the downstream gene does not alter the LPS phenotype. (B) Complementation of SAL1. Both hldA and hldD are required for complementation of SAL1. Gene expression by complementing plasmids was induced with 0.2% rhamnose.
