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Although the number of exopolysaccharide-producing microorganisms runs into the hundreds,only a small number of microbial exopolysaccharides (EPS) are produced on a commercial scale.In order to be competitive new products should possess novel or improved properties in comparison to those already presented on the market.Ethapolan.(A)-an exocellular microbial polysaccharide produced by a non-pathogenic producer has unique physic-chemical properties,which are determined by the presence of hydrophobic acyl residues in macromolecules.