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Proposed schematic LPS structures of variants and their interrelationships. The actual number of Lewis x repeats in NCTC 11637 is higher than indicated. The question mark in the NCTC 11637 LPS structure indicates that this LPS contains nonfucosylated lactosamines, adjacent to the core. dd-Hep, d-glycero-d-manno-heptose. For other abbreviations, see the legend to Fig. 1.
