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Lipid A structures. A, comparison of the structures of lipid A from E. coli K-12 and from N. meningitidis H44/76. B, structure of lipid A from B. pertussis strain B213 and that expected by expression of lpxANm in this strain. The acyl chains that are expected to replace those of the WT in the recombinant strain are indicated in red.
