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Deep rough lipopolysaccharide (LPS) was constructed by a truncated LPS structure by knocking out the waaF gene in Y. enterocolitica. (A) Colony morphology was transformed from smooth to rough due to the deletion of the waaF gene; (B) A truncated LPS structure was constructed by knocking out the waaF gene through silver-stained SDS-PAGE analysis. Representative images from three independent experiments.
