食品科学 ›› 2001, Vol. 22 ›› Issue (10): 21-24.

• 基础研究 • 上一篇    下一篇

几丁质固定化壳聚糖酶的研究

  曾嘉,  郑连英   

  1. 浙江大学化工系生物工程研究所
  • 出版日期:2001-10-15 发布日期:2012-02-15

Study on Optinal Conditions of Immobilized Chifosanase on Chitin

   Zeng-Jia,   Zheng-Lian-Ying   

  • Online:2001-10-15 Published:2012-02-15

摘要: 以几丁质为载体,戊二醛为交联剂,固定壳聚糖酶,对壳聚糖酶的固定化条件、固定化酶的性质进行了研究,确定了酶固定的最佳条件为0.1克几丁质与5ml5%戊二醛交联,固定2mg壳聚糖酶,在此条件下酶活力回收可达70%。固定化酶的最适温度和pH分别为60℃和4.0,动力学参数Km值为17.66g/L。将固定化酶于70℃水浴保温150min,酶活力未见明显下降。该固定化酶具有良好的操作和保存稳定性。

关键词: 几丁质, 固定化, 壳聚糖酶, 壳聚糖

Abstract: Chitosanase was immobilized on chitin with glutaraldehyde by cross-link reaction,the immobilization conditions and characterization of the immobilized enzyme were studied.The optimal conditions for immobilization were as follows:0.1g chitin was treated with 5ml 5% solution of glutaraldehyde,then 2mg chitosanase was immobilized on the carrier.Optimal temperature and pH for the immobilized enzyme were 60℃ and 4.0 respectively.Kinetic parameter Km was 17.66g/L.The immobilized enzyme showed good temperature stability,and its operation and storage stability were also very good.

Key words:  , Chitin Immobilization Chitosanase Chitosan;