Acidic exopolysaccharide from Bradyrhizobium (Chamaecytisus proliferus)

Abstract
M. LEON‐BARRIOS, A.M. GUTIERREZ‐NAVARRO, R. PEREZ‐GALDONA, J. DIAZ‐SIVERIO. J. TRUJILLO AND J. CORZO. 1992. The exopolysaccharide from a strain of Bradyrhizobium isolated in the Canary Islands was studied. The polysaccharide was found to be acidic and composed of glucose, galactose, mannose and galacturonic acid in a relation 3: 1: 1: 1, respectively. Acetyl was the only acyl substituent detected. Polyacrylamide gel electrophoresis showed that it had a polymeric structure with a variable degree of polymerization. At low ionic strength it aggregated but in EDTA solutions it was resolved as a polydisperse sample by gel exclusion chromatography.