Composition of cellulin, the unique chitin-glucan granules of the fungus, Apodachlya sp.

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Abstract
Cellulin granules, the polysaccharide inclusions found uniquely in oomycetous fungi of the order Leptomitales, were isolated from Apodachlya sp. The granules were prepared free of cell wall and cytoplasmic contaminants. Biochemical analyses and X-ray diffraction studies demonstrated that the granules were composed of 60% chitin and 39% glucan consisting of β-1,3-and β-1,6-linked glucose units. A protein content of only 0.1% was attributed to an insignificant amount of cytoplasmic contamination. Isolated granules and those in situ showed no apparent differences in their microscopic form.