Purpose: With inhibitory effect ofα-glucosidase as a pharmacodynamics index, glycoprotein from Marasmius androsaceus was screened, isolated and purified, physiochemical properties and chemical structure of which is characterized. We are trying to discover new activities of Marasmius androsaceus, and relevant active ingredient. Method: 80% Alcohol precipitation was conducted to purify MAEP from water extracts of fermentation product of Marasmius androsaceus. MAEP were further purified by hollow fiber super f...