华南理工大学学报(自然科学版) ›› 2005, Vol. 33 ›› Issue (10): 78-83.

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选择性酶解-超滤制备大豆改性蛋白

杨国龙 赵谋明 杨晓泉 刘通讯 徐鑫 彭志英   

  1. 华南理工大学 轻工与食品学院,广东 广州 510640
  • 收稿日期:2004-12-14 出版日期:2005-10-25 发布日期:2005-10-25
  • 通信作者: 杨国龙(1974-),男,博士生,主要从事食品生物技术研究 E-mail:yg188888@ sohu.com
  • 作者简介:杨国龙(1974-),男,博士生,主要从事食品生物技术研究
  • 基金资助:

    “十五”国家科技攻关项目(2001BA501A02);广东省“十五”科技攻关项目(A20301)

Preparation of Modified Soy Protein by Selective Enzymolysis-Ultrafiltration

Yang Guo-long  Zhao Mou-ming  Liu Tong-xun  Xu Xin  Peng Zhi-ying   

  1. College of Light Chemistry and Food Science,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2004-12-14 Online:2005-10-25 Published:2005-10-25
  • Contact: Yang Guo—long(born in 1974),male,Ph.D.candidate,mainly researches on food biotechnology E-mail:yg188888@ sohu.com
  • About author:Yang Guo—long(born in 1974),male,Ph.D.candidate,mainly researches on food biotechnology
  • Supported by:

    Supported by“the Tenth 5-Year”National Key Technologies R&D Program of China (2001 BA501 A02) and“the Tenth 5-Year” Key Technologies R&D Program of Guangdong Province(A20301)

摘要: 按一定比例混合脱脂豆粕和反渗透水,混合液在pH 8.0及室温下连续搅拌40min,再经离心去渣得到大豆蛋白提取液.将提取液在适当的条件下酶解一超滤,截留液经冷冻干燥得到大豆改性蛋白.所制得产物的蛋白质含量(质量分数)从52.6%提高到78% 以上,回收率大于80%.SDS·PAGE凝胶电泳结果显示,经Alcalase 2.4L改性的大豆蛋白主要含glycinin的碱性亚基,经fungal protease concentrate改性的大豆蛋白主要含glycinin的酸性亚基和碱性亚基.

关键词: 大豆蛋白, 改性, 超滤, 选择性酶解

Abstract:

The soy pmtein(SP)supernatant,obtained by the centrifugation of defatted soy flour suspension in preweighted reverse osmosis water at pH 8.0 after continuous agitation for 40min,was selectively hydrolyzed by protease in certain conditions,and was then subjected to uhrafihration for fractionation.The retentate was ly-ophilized to obtain modified soy protein with the protein content(mass fraction,below the same)increasing from 52.6% to more than 78% .and the yield more than 80%.The results of SDS-PAGE show that the soy
protein modified by Alcalase 2.4L mainly contains the basic subunits of glycinin,and that modified by fungal protease concentrate mainly contains the acid and basic subunits of glycinin.

Key words: soy protein, modification, uhrafihration, selective enzymolysis