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SDS-PAGE analysis of LPSs expressed by gmhA-deficient E. coli χ711 and related E. coli strains. LPS present in proteinase K-treated whole-cell lysates was resolved by Tricine-SDS-PAGE and stained with silver. Lanes: A, E. coli χ705 with a wild-type E. coli gmhA gene; B, E. coli χ711; C, E. coli χ711 containing the pCR2.1 vector; D, E. coli χ711 containing pCR253 with the wild-type H. ducreyi gmhA gene.
