食品科学 ›› 2009, Vol. 30 ›› Issue (14): 31-36.doi: 10.7506/spkx1002-6630-200914001

• 工艺技术 •    下一篇

牛乳中αs、β-酪蛋白组分的分离

张 艳,胡志和* ,赖宜萍   

  1. 天津市食品生物技术重点实验室,天津商业大学生物技术与食品科学学院
  • 收稿日期:2008-10-22 修回日期:2009-01-22 出版日期:2009-07-15 发布日期:2010-12-29
  • 通讯作者: 胡志和 E-mail:hzhihe@tjcu.edu.cn
  • 基金资助:

    天津市重点科技支撑计划项目(07ZCKFNC00200)

Separation of αs- and β-Caseins from Milk

ZHANG Yan,HU Zhi-he*,LAI Yi-ping   

  1. (Tianjin Key Laboratory of Food Biotechnology, College of Biotechnology and Food Science,
    Tianjin University of Commerce, Tianjin 300134, China)
  • Received:2008-10-22 Revised:2009-01-22 Online:2009-07-15 Published:2010-12-29
  • Contact: HU Zhi-he*, E-mail:hzhihe@tjcu.edu.cn

摘要:

以新鲜脱脂牛乳为原料,在碱性条件下添加钙盐进行选择性沉淀分离αs-、β- 酪蛋白组分,并用十二烷基磺酸钠- 聚丙烯酰胺凝胶电泳(SDS-PAGE)法测定分离效果。从CaCl2 溶液终浓度、冷却温度和反复溶解﹑沉淀次数三个方面对αs-、β- 酪蛋白的分离效果进行研究。结果表明:CaCl2 溶液终浓度0.065mol/L,冷却温度2℃,经3 次反复溶解﹑沉淀,分离得到的αs- 酪蛋白组分纯度较高,可达83.33%,β- 酪蛋白组分纯度为109.53%。

关键词: 酪蛋白, αs- 酪蛋白, β- 酪蛋白, 分离

Abstract:

Selective precipitation of αs- and β-caseins from skimmed milk was achieved by the addition of calcium salt at alkaline pH. Effects of final concentration of CaCl2 (adding different volumes of 0.5 mol/L CaCl2 solution to skimmed milk), cooling temperature and repeated dissolution-precipitation procedure times on separation of αs-casein were analyzed by measuring purity of final products using SDS-PAGE followed by Coomassie brilliant blue staining, along with effects of the former two factors on separation of β -casein. The results showed that αs-casein with a purity of 83.33% and β -casein with a purity of 109.53% could obtained when the final concentration of CaCl2 was 0.065 mol/L, the cooling temperature 2 ℃, and the dissolutionprecipitation procedure repeated three times.

Key words: casein, αs-casein, β-casein, separation

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