食品科学 ›› 2013, Vol. 34 ›› Issue (9): 28-32.doi: 10.7506/spkx1002-6630-201309007

• 基础研究 • 上一篇    下一篇

宁夏枸杞籽分离蛋白的功能特性

吴华玉,刘敦华*   

  1. 宁夏银川市宁夏大学农学院
  • 收稿日期:2012-06-30 修回日期:2013-03-25 出版日期:2013-05-15 发布日期:2013-05-07
  • 通讯作者: 刘敦华 E-mail:dunhualiu@126.com
  • 基金资助:

    “十一五”国家科技支撑计划项目(2009BAI72B04)

Functional Properties of Seed Protein Isolate from Chinese Wolfberry (Lycium barbarum L.) Grown in Ningxia

WU Hua-yu,LIU Dun-hua*   

  1. School of Agriculture, Ningxia University, Yinchuan 750021, China
  • Received:2012-06-30 Revised:2013-03-25 Online:2013-05-15 Published:2013-05-07
  • Contact: Dun-hua LIU E-mail:dunhualiu@126.com

摘要:

采用传统的碱提酸沉法从宁夏枸杞籽粕中提取枸杞籽分离蛋白,对其氨基酸含量和功能特性进行测定分析。结果表明:此提取工艺流程可行,宁夏枸杞籽分离蛋白的氨基酸组成较平衡,谷氨酸含量偏高;吸油性和乳化性功能良好,溶解性和持水性一般,起泡性与起泡稳定性相对较差。SDS-PAGE电泳图谱表明,宁夏枸杞籽蛋白含有6种不同分子质量的蛋白亚基,其分子质量分别为48、35、32、20.4、19、18.5kD。

关键词: 宁夏枸杞籽分离蛋白, 氨基酸, 功能特性, 分子质量

Abstract:

Chinese wolfberry seed protein isolate (CWSPI) was extracted by the traditional method of alkali extraction and
acid precipitatio from Chinese wolfberry seeds. Amino acid analysis showed that the amino acid composition of CWSPI was
well-balanced and close to the FAO/WHO standards for composition pattern of essential amino acids, with high glutamic
acid content. CWSPI possessed excellent oil-adsorbing capacity and emulsifying properties, general solubitly and waterholding
capacity, and relatively poor foaming capacity and foam stability. The SDS-PAGE pattern of CWSPI displayed 6
subunits with molecular weight of 48, 35, 32, 20.4, 19 kD and 18.5 kD.

Key words: Chinese wolfberry seed protein isolate, amino acid, functional property, molecular weight

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