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Acidic polysaccharide fromAureobasidium pullulans

Authors
Journal
Transactions of the British Mycological Society
0007-1536
Publisher
Elsevier
Publication Date
Volume
75
Issue
1
Identifiers
DOI: 10.1016/s0007-1536(80)80194-x
Disciplines
  • Biology
  • Physics

Abstract

Aureobasidium pullulans forms an acidic extracellular polysaccharide when grown in liquid, shake or stationary cultures on a range of carbon sources and at different sugar concentrations. The polysaccharide contains glucose (90 %), malic acid (9 %), protein (3 %) and phosphate (0.5 %). The polysaccharide forms an insoluble complex with cetyl-trimethylammonium bromide from which it is recovered in more than 70% yield with the same composition as the original product. Periodate oxidation and Smith degradation indicate that the polysaccharide has 68 % (1 → 3) and 32 % (1 → 6) linkages. The infrared spectrum shows an absorption band at 890 cm −1 characteristic of β-configuration and a band at 1750 characteristic of the carbonyl (-CO-) group of saturated esters.

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