[The structure of extracellular polysaccharide of Arthrobacter globiformis]

An extracellular polysaccharide from Arthrobacter globiformis is composed of N-acetyl-D-glucosamine, N-acetyl-D-fucosamine, 2,3-diacetamido-2,3-dideoxy-D-mannuronic acid and O-acetyl groups in the ratio 1:1:2:1. On the basis of solvolysis with anhydrous hydrogen fluoride, which resulted in a tetrasaccharide fragment, and analysis by 1H and 13NMR spectroscopy, it was concluded that the polysaccharide has the following structure: (formula; see text).