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Abstract
Two types of exoinulinase (2,1-β- d-fructan fructanohydrolase EC 3.2.1.7) were purified from Chrysosporium pannorum AHU 9700. The enzymes, F2 and F3, were glyco-proteins having isoelectric points around pH 4.6 and 4.45. The molecular weights were estimated by SDS-polyacrylamide gel electrophoresis to be 84,000 and 70,000, respectively. The enzymes were active on inulin, sucrose, raffinose, stachyose, and fructo-oligosaccharides, but not on melezitose. Levan could be hydrolyzed by exoinulinase F3, but not by exoinulinase F2. The hydrolysis products of inulin by the two enzymes were fructose and small amounts of glucose.
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