The structure of the extracellular cyclic (1->2)-ß-D-glucan
secreted by Rhizobium tropiciCIAT 899 has been studied
by methylation analysis, 1D and 2D NMR experiments,
HPLC and FAB-MS. Molecular mechanics (MM2) and theoretical
3JHH
coupling constants calculations were performed.
Molecular mechanics minimum energy conformation obtained for the cyclid glucan