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怎样从牛奶中提取酪蛋白

更新时间: 2020-09-21 00:00:00     

利用等电点时溶解度最低的原理:

1、将牛乳的PH调到4、7时酪蛋白沉到最下面,最上边是脂肪可以用盐析法;

2、蛋白质沉淀后,离心10分钟,水洗两次,离心10分钟;

3、加入乙醇,搅拌,悬浊液转移至布氏漏斗中抽滤;

4、用乙醇和乙醚混合液清洗沉淀2次;

5、最后用乙醚清洗沉淀两次,抽干;

6、沉淀风干,得到酪蛋白。

关键词: 怎样 牛奶 提取 蛋白

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