En agua destilada (pero no en disoluciones de KCl, Ca2Cl o EDTA) las moleculas del polisa- carido acido producido por la bacteria Bradyrhizobium (Chamaecytisus) BGA-1 se asociaron entre si. No se encontraron pruebas de que las moleculas del polisacarido se uniesen mediante enlaces io- nicos con cationes divalentes. Mediante cromatografia en Sephacryl HR400 y usando patrones lineales de dextrano se determino el grado de polimerizacion de la unidad pentasacaridica basica del polisacarido, que result© estar comprendido entre 26 y 105, predominando las moleculas formadas por 43-44 repeticiones del pentasacarido.
The molecules of the acidic polysaccharide produced by the bacterium Bradyrhizobium (Chamaecytisus) BGA-1 were associated when dissolved in water, but not when dissolved in KCl, Ca2Cl or EDTA solutions. We have found no proof of divalent cation-mediated binding of the poly- saccharide molecules. The polymerisation degree of the basic pentasaccharide unit was determined by chromatography in Sephacryl HR400 with lineal dextran molecules used as molecular weight standards. It ranged between 26 to 105 repeating units, being more frequent the molecules made by 43-44 pentasaccharides.
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