Abstract
The exopolysaccharides (EPS) of two unicellular strains of cyanobacteria Synechocystis PCC 6803 and 6714, formed labile, radial structures, uniformly distributed on the cell surface, and stainable by specific dyes for acidic polysaccharides. The two strains produced EPS at similar rates, which depended, along with the duration of the producing phase, on the incubation conditions. The exopolysaccharides from both strains were constituted of at least 11–12 mono-oses, probably forming several types of polymers. They contained about 15–20% (w/w) uronic derivatives and 10–15% (w/w) osamines. Proteins represented 20–40% of total weight. A most interesting feature was the presence of 7–8% (molar ratio) sulphate residues, a characteristic that is otherwise limited to exopolysaccharides produced by eukaryotic algae.
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Abbreviations
- EPS:
-
exopolysaccharides
- KDO:
-
3-deoxy-d-mannooctulosonate
- LPS:
-
lipopolysaccharides
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Panoff, JM., Priem, B., Morvan, H. et al. Sulphated exopolysaccharides produced by two unicellular strains of cyanobacteria, Synechocystis PCC 6803 and 6714. Arch. Microbiol. 150, 558–563 (1988). https://doi.org/10.1007/BF00408249
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DOI: https://doi.org/10.1007/BF00408249