POLYSACCHARIDES FORMED BY THE YEAST BULLERA-SINGULARIS

The ability of the yeast Bullera singularis VKM Y-1299 to form extrace llular polysaccharides was studied. The culture synthesized identical galactomannans with a ratio of galactose to mannose of 1:1.2 on two di fferent nutrient media. Glycoside linkages C1 --> C4 and C1 --> C3 wit h an-alpha-configuration predominated in the polymers. The culture stu died produced neither glucuronoxylomamans characteristic of the yeasts of the genus Bullera nor beta-mannans typical of representatives of t he genus Sporobolomyces. This confirms the literature data on the isol ated position of B. singularis in the family Sporobolomycetaceae.