食品科学 ›› 2008, Vol. 29 ›› Issue (12): 486-489.

• 生物工程 • 上一篇    下一篇

酪蛋白和乳球蛋白的抗体及酶标物制备研究

 宋宏新, 柏红梅, 薛海燕, 马冬, 刘静   

  1. 陕西科技大学生命科学与工程学院;
  • 出版日期:2008-12-15 发布日期:2011-12-08

Preparation of β-Casein and β-Lacotoglobuli Antibodies and Enzyme-labeled Antigens

 SONG  Hong-Xin, BAI  Hong-Mei, XUE  Hai-Yan, MA  Dong, LIU  Jing   

  1. Institute of Life Science and Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China
  • Online:2008-12-15 Published:2011-12-08

摘要: 选用牛乳中的β-酪蛋白(β-CN)和β-乳球蛋白(β-Lg)为抗原对鸡体免疫,从鸡卵黄中用水稀释法及亲和色谱(HiTrapTM IgY Purification HP)纯化特异性鸡卵黄抗体(IgY)。PAGE电泳分析IgY纯度高达90%,ELISA效价为1:4096。用过碘酸钠氧化法进行抗原的过氧化物酶(HRP)标记,HRP与β-CN和β-Lg的分子个数比分别为1:1和1.5:1的标记效果最好,β-CN-HRP和β-Lg-HRP的效价高达1:640,其ELISA工作浓度分别为1:80和1:40。特异性IgY和酶标抗原为特异检测牛乳蛋白的酶联免疫吸附(ELISA)分析提供必要条件。

关键词: &beta, -酪蛋白(&beta, -CN), &beta, -乳球蛋白(&beta, -Lg), 鸡卵黄抗体(IgY), 抗原酶标, 酶联免疫吸附

Abstract: Hens were immunized with the antigen of bovine-β-casein(β-CN) and β-lactoglobulin(β-Lg),and the egg yolk immunoglobulin(IgY) of the hens was purified by the methods of water diluting and affinity chromatography(HiTrapTM IgY Purification HP). The purity of IgY is as high as 90% by PAGE and the ELISA titer is 1:4096. In the NaIO4 labeled method,the antigens were conjugated with horseradish peroxidase(HRP),respectively. The molar ratios between HRP and β-CN or β-Lg for the best labeling effect are 1:1 and 1.5:1,respectively. Theβ-CN-HRP and β-Lg-HRP titers are both 1:640,and their operation concentrations are 1:80 and 1:40,respectively.

Key words: &beta, -casein; &beta, -lactoglobulin; egg yolk antibody; enzyme-labeled antigen; ELISA;