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Simultaneous detection of DNA from 10 food allergens by ligation-dependent probe amplification

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The simultaneous detection of DNA from different allergenic food ingredients by a ligation-dependent probe amplification (LPA) system is described. The approach allows detection of several targets in a one-tube assay. Synthetic oligonucleotides were designed to detect DNA from peanuts, cashews, pecans, pistachios, hazelnuts, sesame seeds, macadamia nuts, almonds, walnuts and brazil nuts. The specificity of the system was tested with DNA from more than 50 plant and animal species. The sensitivity of the method was suitable to detect allergenic ingredients in the low mg kg-1 range. The limit of detection (LOD) for single allergens in different food matrices was 5 mg kg-1. The novel analytical strategy represents a useful tool for the surveillance of established legislation on food allergens within the European Union.
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Keywords: PCR; detection; food allergen; ligation; peanut; sesame; tree nuts

Document Type: Research Article

Affiliations: 1: Department of General Food Technology, Technische Universitat Munchen, D-85350 Freising-Weihenstephan, Germany 2: Bavarian Health and Food Safety Authority, Germany

Publication date: April 1, 2009

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