The extracellular polysaccharide of Xanthomonas phaseoli.

摘要: The extracellular polysaccharide produced by Xanthomonas phaseoli has been purified and shown to be homogeneous examination in the analytical ultra-centrifuge, moving boundary electrophoresis, gradient precipitation with ethanol. Following hydrolysis constituent sugars of were isolated positively identified as crystalline derivatives D-glucose D-mannose lactone D-glucuronic acid. above hexoses found present relative proportions 1:1:1.The results a preliminary investigation which C14-labelled glucose was supplied rapidly growing cells indicate that it is unlikely single six-carbon precursor formed from all three sugar components are synthesized directly.