... a result of the hydrophobic nature of the OPS that contains deoxy sugars only.GLC-MS analysis of the alditol acetates showed that the core oligosaccharide from both LPS contains Glc, Gal,GalN ... was hydro-lysed, as described above for sugar analysis, and the partially methylated monosaccharides derived were conver-ted into the alditol acetates and analysed by GLC-MS.Smith degradationOPS-I, ... of D-ara4dHex) from strainPCM 1531 showed any inhibitory activity. Therefore, bothO-acetyl groups andD-ara4dHex play an important role inmanifesting the serological specificity of C. braakii...