食品科学 ›› 2011, Vol. 32 ›› Issue (14): 21-24.doi: 10.7506/spkx1002-6630-201114005

• 工艺技术 • 上一篇    下一篇

蚕蛹多糖脱蛋白方法研究

伍善广1,2,赖泰君1,孙建华1,刘旭辉1,3,童张法1,廖丹葵1,*   

  1. 1. 广西大学化学化工学院
    2.柳州医学高等专科学校 3.河池学院化学与生命科学系
  • 出版日期:2011-07-25 发布日期:2011-06-18
  • 基金资助:
    广西自然科学基金项目(桂科自0728237);广西壮族自治区教育厅科研项目(200607MS031); 广西大学基金项目(X071029)

A Comparative Investigation into Deproteinization Methods for Silkworm Pupa Polysaccharides

WU Shan-gang1,2,LAI Tai-jun1,SUN Jian-hua1,LIU Xu-hui1,3,TONG Zhang-fa1,LIAO Dan-kui1,*   

  1. (1. College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; 2. Liuzhou Medical College, Liuzhou 545006, China; 3. Department of Chemistry and Life Science, Hechi University, Yizhou 546300, China)
  • Online:2011-07-25 Published:2011-06-18

摘要: 以蛋白去除率和多糖损失率为指标,比较Sevag法、三氯乙酸(trichloroacetic acid,TCA)法、木瓜蛋白酶法、木瓜蛋白酶-Sevag联用法和木瓜蛋白酶-TCA联用法脱除蚕蛹多糖蛋白的效果。结果显示:木瓜蛋白酶-TCA联用效果最好,其脱蛋白的最佳条件为木瓜蛋白酶用量[E]/[S] 2.0%、酶解温度50℃、酶解反应1.5h、采用TCA法除蛋白1次,此时蛋白去除率为97.98%,多糖损失率为18.76%;紫外光谱扫描定性实验显示脱蛋白的多糖在260~280nm处只有少量吸收,表明大多数蛋白已去除。木瓜蛋白酶-TCA联用法是一种有效的多糖脱蛋白方法。

关键词: 多糖, 脱蛋白, 蚕蛹

Abstract: Protein removal rate and polysaccharide loss rate were used to evaluate and compare the effectiveness of Savag, s method, trichloroacetic acid (TCA) method, papain method and papain-TCA (papain hydrolysis followed by TCA precipitation) method in deproteinizing silkworm pupa polysaccharides. Papain-TCA method was found to be the best method for the deproteinization of silkworm pupa polysaccharides, and the optimal operating conditions were 1.5 h hydrolysis with papain at an enzyme-to-substrate of 2.0% and 50 ℃ followed by once treatment with TCA. A protein removal rate of 97.98% and a polysaccharide loss rate of 18.76% were achieved under such conditions. Only one absorption peak was observed in the UV-visible scanning spectrum of deporteinized silkworm pupa polysaccharides, indicating the removal of almost all proteins.

Key words: pupa, polysaccharide, protein, removal

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