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  • Title: [Structure and properties of the lipopolysaccharide of Pseudomonas fluorescens IMV 2366 (biovar III)].
    Author: Veremeĭchenko SN, Zdorovenko GM.
    Journal: Mikrobiologiia; 2004; 73(3):312-9. PubMed ID: 15315223.
    Abstract:
    The lipopolysaccharide (LPS) preparation isolated from the bacterial mass of Pseudomonas fluorescens IMV 2366 (biovar III) by Westphal's method and purified by repeated ultracentrifugation was characterized by the presence of the S- and R-forms of molecules. The following structural portions of the LPS molecule were obtained in the individual state and characterized: lipid A, core oligosaccharide, and O-specific polysaccharide. The main components of the lipid A hydrophobic moiety were 3-hydoxydecanoic, 2-hydroxydodecanoic, 3-hydroxydodecanoic, dodecanoic, and hexadecanoic fatty acids. Glucosamine, phosphoethanolamine, and phosphorus were identified as the components of the lipid A hydrophilic moiety. Rhamnose, glucose, galactose, glucosamine, galactosamine, alanine, phosphoethanolamine, phosphorus, 2-keto-3-desoxyoctulosonic acid (KDO), as well as 2-amino-2,6-didesoxygalactose (FucN) and 3-amino-3,6-didesoxyglucose (Qui3N), were revealed in the composition of the core oligosaccharide fractions. O-specific polysaccharide chains were established to be composed of repeating trisaccharide units consisting of residues of L-rhamnose (L-Rha), 2-acetamido-2,6-didesoxy-D-galactose (D-FucNAc), and 3-acylamido-3,6-didesoxy-D-glucose (D-Qui3NAcyl), where Acyl = 3-hydroxy-2,3-dimethyl-5-hydroxyprolyl. Neither double immunodiffusion in agar not the immunoenzyme assay revealed serological relations between the strain studied and the P. fluorescens strains studied earlier.
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