SUMMARY: An alkali-soluble glucan from the cell walls of NCYC 1109 has been hydrolysed with a purified endo-(1 →-3)-β-D-glucanase and an endo-(1 → 6)-β-D-glucanase from WL-12. The products of enzyme action include various oligosaccharide and polysaccharide fractions which have been separated by gel filtration and characterized, giving new information on the fine structure of the glucan. The isolated cell walls have also been subjected to enzymic hydrolysis. The results suggest that part of the cell-wall mannan is held in place by a glucan component.


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