Abstract
1. 1. Two glucans were isolated from the hyphal wall of Schizophyllum commune and analyzed by complete and partial acid hydrolysis, enzymatic hydrolysis, periodate oxidation, optical rotation, X-ray diffraction and electron microscopy. 2. 2. A mucilage, present at the outer surface of the wall and also in the culture medium, consists of chain of 1,3-linked β- d- glucosyl units with branches of single β- d- glucosyl units attached by 1,6 linkages on every fourth unit, on average, along the chain. It has a typical hydroglucan X-ray diffraction pattern after boiling with dilute acid and an [α] d 25 of approx. + 32°. 3. 3. An alkali-soluble glucan, S-glucan, located beneath the mucilage and accounting for about 45% of the thickness of the water-insoluble portion of the wall, consists of chains of 1,3-linked α- d- glucosyl units. Without treatments it produces a characteristic X-ray diffraction diagram. It is highly dextrorotary with an [α] d 25 of +242°. 4. 4. The S-glucan is present in the wall in a microcrystalline form and both the S-glucan in the wall and chemically isolated S-glucan have a typical rodlet structure.
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