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Histogram showing the length distribution of the LPSs of PA103 and the four mutants. DΔM and Wzy::GM show the shortest lengths resulting from interactions with A-band LPS molecules. Following is ΔWzz2 with the long O-antigen side chain preserved. The wild type and ΔWzz1 (lacking long O-antigen side chains but still possessing the very long ones) express LPSs of the greatest length.
