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Zusammenfassung:
Using sugar and methylation analyses, and one‐ and two‐dimensional 1H‐NMR spectroscopy at 500 MHz it was established that poly‐β‐1,2‐4‐deoxy‐D‐arabinohexopyranose occurs as O‐specific chains of lipopolysaccharides in Citrobacter serotypes O4, O27 and O36. Strong serological cross‐reactivity between these serotypes is in full agreement with the chemical identity of their O‐specific polysaccharides.