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Lipid A structures. (A) S. enterica lipid A. Well-characterized LpxO and PagL modifications are shown in red. Ara4N additions are shown in blue. The structure was reproduced from Kawasaki et al. (40) and Gibbons et al. (52). (B) Current B. pseudomallei lipid A structure from the literature, with assumed PagL and LpxO modifications (30, 33, 43, 51). Carbon lengths of acyl chains are indicated below each chain.
