食品科学 ›› 2011, Vol. 32 ›› Issue (6 ): 11-15.doi: 10.7506/spkx1002-6630-201106003

• 工艺技术 • 上一篇    下一篇

分离β-伴大豆球蛋白和大豆球蛋白工艺研究

姜 剑1,迟玉杰1,2,*,孙艳梅3,范 淼1,王喜波1   

  1. 1.东北农业大学食品学院 2.教育部大豆生物学重点实验室 3.东北农业大学理学院应用化学系
  • 收稿日期:2010-04-26 修回日期:2011-01-18 出版日期:2011-03-25 发布日期:2011-03-03
  • 通讯作者: 迟玉杰 E-mail:yjchi@126.com;chiyujie@hotmail.com
  • 基金资助:
    黑龙江省自然科学基金重点项目(ZD200902)

An Investigation into the Separation Process forβ-Conglycinin and Glycinin

JIANG Jian1,CHI Yu-jie1,2,*,SUN Yan-mei3,FAN Miao1,WANG Xi-bo1   

  1. 1. School of Food Sciences, Northeast Agricultural University, Harbin 150030, China ;
    2. Key Laboratory of Soybean Biology, Ministry of Education, Harbin 150030, China ;
    3. Department of Application Chemistry, College of Science, Northeast Agricultural University, Harbin 150030, China
  • Received:2010-04-26 Revised:2011-01-18 Online:2011-03-25 Published:2011-03-03
  • Contact: CHI Yu-jie1 E-mail:yjchi@126.com;chiyujie@hotmail.com

摘要: 采用大容量(250×4mL)低速(5300×g)离心机分离β-伴大豆球蛋白和大豆球蛋白,进行碱溶条件、酸沉条件等条件的研究。结果表明:提取蛋白的碱性溶液(pH8.5的Tris-HCl溶液)离心效果较佳,沉淀大豆球蛋白pH6.4为佳,沉淀β-伴大豆球蛋白pH4.8为佳,用pH5.0沉淀杂蛋白离心分离效果较好;每一个待离心的浊液,在离心之前4℃冷藏2h以上,对离心效果的提高十分有效;采用最佳条件,从300g脱脂豆片分离大豆球蛋白和β-伴大豆球蛋白,收率分别为6.8%和2.2%,用SDS-PAGE电泳实验方法测定大豆球蛋白和β-伴大豆球蛋白样品纯度分别为89.1%和78.9%。因此该低速离心法较适合数十克级别的β-伴大豆球蛋白和大豆球蛋白的分离。

关键词: β-伴大豆球蛋白, 大豆球蛋白, 分离

Abstract: β-conglycinin and glycinin were separated by large-capacity (250 × 4 mL) low-speed (5300 × g) centrifugation at the condition of alkali dissolution and acid precipitation. Results indicated that better centrifugation efficiency of soybean protein was in pH 8.5 Tris-HCl solution; The optimal pH values for precipitating glycinin andβ-conglycinin were 6.4 and 4.8, respectively. Meanwhile, the optimal pH for removing the impure proteins was 5.0. The enhancement of entrifugation efficiency was achieved by keeping turbid liquid at 4 ℃ for more than 2 h before centrifugation. Under the optimal conditions, the yields of glycinin andβ-conglycinin were 6.8% and 2.2%, respectively. The purities of separated proteins determined by SDS-PAGE were 89.1% and 78.9%. Low-speed centrifugation is suitable for separatingβ-conglycinin and glycinin.

Key words: β-conglycinin, glycinin, separation

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