[1]张咪,高璐,印伯星,等.基于αs-酪蛋白特异性的牛乳总蛋白质ELISA 定量检测方法的建立[J].江苏农业学报,2015,(01):87-92.[doi:10.3969/j.issn.1000-4440.2015.01.013]
 ZHANG Mi,GAO Lu,YIN Bo-xing,et al.Establishment of a quantitative ELISA method for detection of total milk protein based on the specificity of αs-casein[J].,2015,(01):87-92.[doi:10.3969/j.issn.1000-4440.2015.01.013]
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基于αs-酪蛋白特异性的牛乳总蛋白质ELISA 定量检测方法的建立()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2015年01期
页码:
87-92
栏目:
畜牧兽医·水产养殖
出版日期:
2015-02-28

文章信息/Info

Title:
Establishment of a quantitative ELISA method for detection of total milk protein based on the specificity of αs-casein
作者:
张咪1高璐1印伯星2苏万业13杨振泉13顾瑞霞13
(1.扬州大学食品科学与工程学院,江苏扬州225127;2.扬州市康源乳业有限公司,江苏扬州225009;3.江苏省乳品生物技术与安全控制重点实验室,江苏扬州225127)
Author(s):
ZHANG Mi1GAO Lu1YIN Bo-xing2SU Wan-ye13YANG Zhen-quan13GU Rui-xia13
(1.College of Science and Engineering, Yangzhou University, Yangzhou 225127, China;2.Yangzhou Kangyuan Dairy Ltd, Yangzhou 225009, China;3.Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou 225127, China)
关键词:
牛乳αs酪蛋白ELISA总蛋白
Keywords:
milkαs-caseinELISAtotal protein
分类号:
TS252.1
DOI:
10.3969/j.issn.1000-4440.2015.01.013
文献标志码:
A
摘要:
本研究旨在建立牛乳中总蛋白质的ELISA定量检测方法,并评价该方法在牛乳掺假辨识中的应用效果。首先用αs-酪蛋白标准品免疫新西兰白兔,制备αs-酪蛋白特异性抗血清,并建立αs-酪蛋白的间接ELISA检测方法,结果显示血清效价为1∶640,αs-酪蛋白检测的线性范围是25600 ng/ml,R2=0.999 5,回收率是 96.6%105.2%。再应用乳成分分析仪,凯氏定氮法和所建立的ELISA法测定8份来源不同的原料乳中总蛋白和αs-酪蛋白含量,结果显示不同牛乳中总蛋白质含量在0.029 20.029 8 g/ml,αs-酪蛋白含量在0.008 40.009 2 g/ml,占牛乳总蛋白质的比例恒定,平均为0.3,并用该系数建立牛乳中总蛋白质的定量方法。最后对5份人为兑水稀释、添加尿素、BSA和三聚氰胺的模拟掺杂牛乳样品进行检测,测定结果表明基于αs-酪蛋白的ELISA方法比乳成分分析仪法和凯氏定氮法具有更高的灵敏性和特异性,含氮添加物对测定结果无显著影响(P>0.05),更适合于作为原料乳及含乳产品中牛乳蛋白质的定量分析。
Abstract:
This study aims to establish a ELISA method to quantify the total protein (TP) in milk and to evaluate its application in identification of the adulterated milk. Here, αs-casein (αs-CN) standard sample was used to immunize New Zealand white rabbits for preparing anti-αs-CN polyclonal antibody (PcAb). The result showed that the titer of PcAb was 1∶640, and the linear range of the detection of αs-CN was 25600 ng/ml with correlation coefficient of 0.999 5 and the recovery rate between 96.6% and 105.2%. The contents of αs-CN and TP in milk from 8 different resources ranged from 0.008 4 to 0.009 2 g/ml and from 0.029 2 to 0.029 8 g/ml detected by milk analyzer and kjeldah method. The percentage of αs-CN to TP stayed constant at 0.3, which led to the successful development of αs-CN-based ELISA for detection of TP in milk. The ELISA method showed better sensitivity and specificity than the other two approaches in four milk samples which were diluted with water and artificially added with urea, BSA and melamine, respectively. The content of αs-CN was independent of nitrogen additives. In conclusion, the established ELISA method was suitable for analyzing the TP content in the milk and milk products.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2014-06-17 基金项目:国家自然科学基金项目(31371806);扬州市科技攻关项目(yz2011090);江苏省青蓝工程资助项目 作者简介:张咪(1990-),女,江苏宜兴人,硕士研究生,研究方向为食品微生物应用与控制研究。(E-mail)zhangmi900911@sina.com 通讯作者:杨振泉,(E-mail)yangzq@yzu.eud.cn
更新日期/Last Update: 2015-02-28