Abstract
Two different acidic polysaccharides (I and II) were detected in the external cell envelope layers (slime and capsule) of Rhodopseudomonas capsulata Sp11. Polysaccharide I contains rhamnose, fucose, glucosamine and an unknown acidic sugar, it represents the slime material of the strain. Polysaccharide II contains rhamnose, galactose, 3-amino-3,6-dideoxygalactose, an unknown amino sugar and galacturonic acid, it represents very likely the capsule of R. capsulata Sp11.
Polysaccharide I has a serological specificity different from that of polysaccharide II as shown by immunoprecipitation using antisera against living cells. Polysaccharide II, but not polysaccharide I, reacts in antiserum against heattreated cells (100°C, 2.5 h). Whole cells are agglutinated in the antisera against living but not in those against heattreated cells.
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Omar, A.S., Weckesser, J. & Mayer, H. Different polysaccharides in the external layers (capsule and slime) of the cell envelope of Rhodopseudomonas capsulata Sp11. Arch. Microbiol. 136, 291–296 (1983). https://doi.org/10.1007/BF00425219
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DOI: https://doi.org/10.1007/BF00425219