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  • Title: A new variety of Aureobasidium pullulans characterized by exopolysaccharide structure, nutritional physiology and molecular features.
    Author: Yurlova NA, de Hoog GS.
    Journal: Antonie Van Leeuwenhoek; 1997 Aug; 72(2):141-7. PubMed ID: 9298193.
    Abstract:
    The black yeast Aureobasidium pullulans (de Bary) Arnaud is known to synthesize the exopolysaccharide pullulan, a poly-alpha-1,6-maltotriose. Nine strains were found to produce additional aubasidan-like EPS, i.e. glucans with alpha-1,4-D-, beta-1,6-D- and beta-1,3-D-glycosidic bonds. These strains had previously been found to deviate in genotypic characters. Additional physiological differences were found: the optimal nitrogen source for exopolysaccharide production in liquid medium was NaNO3 for aubasidan-producing strains, and (NH4)2SO4 for the remaining strains. A new variety, A. pullulans var. aubasidani Yurlova, is described for the strains producing aubasidan-like components. The new variety can be distinguished from A. pullulans var. pullulans by the absence of assimilation of methyl-alpha-D-glucoside and lactose.
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