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Study of immunochemical heterogeneity of Azospirillum brasilense lipopolysaccharides

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Abstract

A comparative immunochemical analysis of lipopolysaccharides (LPS) in Azospirillum brasilense model strains Sp7 and Sp245 and in mutants with altered somatic antigens has been performed. According to the results of a complex of various immunochemical methods, including studies with polyclonal antibodies against the LPS these bacteria, their LPS consist of an assembly of macromolecules with different antigenic characteristics. Two types of O-specific polysaccharides (O-PS) are present in the LPS of every strain of A. brasilense under study. The major difference between the two O-PS is the antigenic heterogeneity of one of them. This heterogeneous O-PS has been shown to possess at least two O-factors (antigenic determinants) different in their structure. Meanwhile, according to all the tests performed, the other O-PS in every strain is immunochemically homogeneous and identical to one of the determinants revealed in the more diversified O-PS. The LPS heterogeneity among the given strains may be due to the pattern of O-specific polysaccharide synthesis, one of the O-PS being an intermediate in the synthesis of the other.

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Authors and Affiliations

  1. Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, pr. Entuziastov 13, Saratov, 410049, Russia

    L. Yu. Matora, G. L. Burygin & S. Yu. Shchyogolev

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  1. L. Yu. Matora
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  2. G. L. Burygin
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  3. S. Yu. Shchyogolev
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Correspondence to L. Yu. Matora.

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Original Russian Text © L.Yu. Matora, G.L. Burygin, S.Yu. Shchyogolev, 2008, published in Mikrobiologiya, 2008, Vol. 77, No. 2, pp. 196–200.

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Matora, L.Y., Burygin, G.L. & Shchyogolev, S.Y. Study of immunochemical heterogeneity of Azospirillum brasilense lipopolysaccharides. Microbiology 77, 166–170 (2008). https://doi.org/10.1134/S0026261708020070

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