The chitosan with degree of deacetylation of 92.84%, and with weight of 7.84105 dalton is used as carrier for enzyme immobilization. The optimum conditions of immobilization are pH6.0 and 3% glutaradehyde. Recovery of enzyme activity is 59%.

• 固定化最佳条件；以脱乙酰度为92.；8%25；平均分子量为7