title: Extracellular oligosaccharides and low-Mr polysaccharides containing (1----2)-beta-D-glucosidic linkages from strains of Xanthomonas, Escherichia coli and Klebsiella pneumoniae.
abstract: One strain each of Xanthomonas campestris and 'Xanthomonas phaseoli', three strains of 'Xanthomonas oryzae', and five strains each of Escherichia coli and Klebsiella pneumoniae were found to produce a mixture of (1----2)-beta-D-gluco-oligosaccharides and/or low-Mr (1----2)-beta-D-glucans in their culture media. The saccharides from the strains of Xanthomonas were all composed of unbranched, linear (1----2)-beta-D-glucosaccharides with degrees of polymerization (DPs) of 8 to about 20, and a cyclic (1----2)-beta-D-glucan (DP16) containing one (1----6)-linkage and one alpha-linkage. The saccharides produced by the five strains of E. coli and four strains of K. pneumoniae were glucans with branches at O-6, and DPs of 10 to 15, whereas one strain of K. pneumoniae produced unbranched linear (1----2)-beta-D-glucosaccharides with DPs of 6 to about 20.
mesh_terms: D002849:Chromatography, Gas; D002851:Chromatography, High Pressure Liquid; D004926:Escherichia coli / Q000378:metabolism*; D007711:Klebsiella pneumoniae / Q000378:metabolism*; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D008970:Molecular Weight; D009844:Oligosaccharides / Q000378:metabolism*; D011135:Polysaccharides, Bacterial / Q000378:metabolism*; D014974:Xanthomonas / Q000378:metabolism*
chemical_list: D009844:Oligosaccharides; D011135:Polysaccharides, Bacterial