An O-antigen polysaccharide fraction (Ke-PS) was isolated from Komagataeibacter europaeus NBRC 3261. In addition to chemical analyses, its structure was characterized by 1D and 2D H as well as C NMR spectroscopy. The polysaccharide is composed of linear disaccharide repeating unit that consists of d-galactose and d-glycero-d-manno-heptose: →7)-α-d,d-Hepp-(1 → 2)-α-d-Galp-(1 → .
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