THE STRUCTURE OF THE CARBOHYDRATE BACKBONE OF THE LIPOPOLYSACCHARIDE FROM ACINETOBACTER STRAIN ATCC-17905

The structure of the carbohydrate backbone of the lipopolysaccharide f rom Acinetobacter strain ATCC 17905 was studied. After deacylation of the lipopolysaccharide, a mixture of two compounds (ratio approximatel y 2:1) was isolated by high-performance anion-exchange chromatography, the structures of which were determined by NMR spectroscopy and elect rospray-mass spectrometry as [GRAPHICS] [Sug, 3-deoxy-D-manno-2-octulo pyranosonic acid (Kdo) in oligosaccharide 1 (major portion) and D-gluc ero-D-talo-2-octulopyranosonic acid (Ko) in oligosaccharide 2 (minor p ortion)]. All monosaccharide residues also possess the D-configuration and are present in the pyranose form.