食品科学 ›› 2013, Vol. 34 ›› Issue (21): 278-282.doi: 10.7506/spkx1002-6630-201321056

• 生物工程 • 上一篇    下一篇

海藻酸钠与结冷胶协同固定葡萄糖氧化酶的特性研究

余 君,徐淑霞,高玉千,张庭静,张世敏,吴 坤   

  1. 1.河南农业大学生命科学学院,河南 郑州 450002;2.河南农业职业学院,河南 郑州 451450
  • 收稿日期:2012-11-07 修回日期:2013-10-11 出版日期:2013-11-15 发布日期:2013-10-28
  • 通讯作者: 吴坤 E-mail:wukun63@126.com

Immobilization of Glucose Oxidase into Sodium Alginate and Gellan Gum Mixture

YU Jun,XU Shu-xia,GAO Yu-qian,ZHANG Ting-jing,ZHANG Shi-min,WU Kun   

  1. 1. College of Life Science, Henan Agricultural University, Zhengzhou 450002, China;
    2. Henan Vocational College of Agriculture, Zhengzhou 451450, China
  • Received:2012-11-07 Revised:2013-10-11 Online:2013-11-15 Published:2013-10-28

摘要:

利用海藻酸钠与结冷胶协同固定葡萄糖氧化酶,研究固定化条件及固定化酶的性质,并与海藻酸钠单独固定葡萄糖氧化酶的特性进行比较。结果表明:在海藻酸钠质量浓度20g/L,其与结冷胶体积比4:1,氯化钙质量浓度60g/L,加酶量4%,固定化时间0.5h的条件下,协同固定化酶活回收率为75.76%,而海藻酸钠单独固定葡萄糖氧化酶活回收率仅为65.82%。与游离酶相比,协同固定化酶的最适反应温度保持不变为35℃,最适pH值由5.5升至6.0。另外,协同固定化的葡萄糖氧化酶具有良好的热稳定性和贮藏稳定性,重复使用率较高。

关键词: 葡萄糖氧化酶, 固定化酶, 海藻酸钠, 结冷胶, 凝胶颗粒

Abstract:

Compared with the characteristics of immobilized glucose oxidase using sodium alginate as the carrier, the conditions
of immobilized glucose oxidase using sodium alginate and gellan gum as the carriers and the characteristics of the immobilized
enzyme were studied. The results showed that the recovery of immobilized enzyme after 0.5 h immobilization was 75.76%. Under
the optimum operating conditions of 20 g/L, 60 g/L, 4% and 4:1 for sodium alginate concentration, CaCl2 concentration, glucose
oxidase and sodium alginate-to-gellan gum ratio, respectively, the recovery of immobilized glucose oxidase using common sodium
alginate as the carrier was 65.82%. Compared with the free enzyme, the optimum temperature of immobilized enzyme was 35 ℃,
and the optimum pH increased from 5.5 to 6.0. In addition, the immobilized enzyme with sodium alginate and gellan gum together
as the carriers had better thermal stability, storage stability, and reusability.

Key words: glucose oxidase, immobilized enzyme, sodium alginate, gellan gum, gel particle

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