ABSTRACT Antigenicity of pathogenic yeast Candida zeylanoides NBRC 10326 was found to have similar to that of Candida guilliermondii, but it was slightly different, i.e. NBRC 10326 strain cells react strongly with the factor antibodies 1, 4, and 9, and react relatively weakly with factor antibody 5. We have investigated the structural characteristic of cell wall mannan of this strain using a non-degradable method, nuclear magnetic resonance analysis. The results obtained from NMR analysis, the two-dimensional homonuclear Hartmann-Hahn, indicated that C. zeylanoides mannan contains α-1,3-linked and β-1,2-linked oligomannosyl side chains corresponding to C. guilliermondii specific antigenic factor 9. In addition, it was found that the mannan contains β-1,2-linked oligomannosyl side chains attached to phosphate groups corresponding to anitigenic factor 5, which were not found in C. guilliermondii mannan.
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