食品科学 ›› 2009, Vol. 30 ›› Issue (12): 213-214.doi: 10.7506/spkx1002-6630-200912047

• 分析检测 • 上一篇    下一篇

实时荧光P C R 法检测食品中芝麻过敏原成分

麻丽丹1,曹际娟2,高海燕3,巴中华1   

  1. 1.丹东出入境检验检疫局 2.辽宁出入境检验检疫局 3.河南科技学院食品学院
  • 收稿日期:2008-09-09 修回日期:2009-01-09 出版日期:2009-06-15 发布日期:2010-12-29
  • 通讯作者: 麻丽丹 E-mail:2212097@163.com

Real-time Fluorescent PCR Detection of Allergen in Sesame

MA Li-dan1,CAO Ji-juan2,GAO Hai-yan3,BA Zhong-hua1   

  1. (1. Dandong Entry-Exit Inspection and Quarantine Bureu, Dandong 118000, China;2. Liaoning Entry-Exit Inspection and
    Quarantine Bureu, Dalian 100161, China;3. College of Food, Henan Institute of Science and Technology, Xinxiang 453003, China)
  • Received:2008-09-09 Revised:2009-01-09 Online:2009-06-15 Published:2010-12-29
  • Contact: MA Li-dan1, E-mail:2212097@163.com

摘要:

本实验探讨采用实时荧光定量PCR 方法检测食品中的芝麻成分,结果表明:采用芝麻的引物和探针进行扩增时;22 种样品经实时PCR 扩增,只有白芝麻和黑芝麻产生荧光信号,其余样品均不产生荧光信号。灵敏度实验结果表明能检测到10-5 稀释度的4.4 ×10-12g DNA的量,定量关系式为:y=- 3.472018x+18.851009,R2=0.993088。这两对引物和探针具有极高的灵敏度和扩增效率,符合痕量检测要求。

关键词: 芝麻, 实时PCR, 过敏原检测

Abstract:

This study aimed to develop a real-time fluorescent PCR assay for specific detection of allergen in sesame. Realtime PCR amplification was conducted to DNA fragments from 22 samples including white sesame and black sesame as well as other different samples using a primer pair and a probe specific for sesame DNA fragment. Both the black sesame and white sesame DNA fragments exhibited fluorescent signal, but others did not. Sensitivity analysis showed that 4.4×10-12g of sesame DNA with the dilution of 10-5 could be detected, and the quantitative formula was Ct = -3.472018l ln (initial copy number) + 18.851009, R2 = 0.993088, indicating that the primer pair and the probe have high sensitivity and amplification efficiency and fit with the requirements of trace detection.

Key words: sesame, real-time PCR, allergen detection

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