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Nature 416, 602 (11 April 2002) | doi:10.1038/nature740; Published online 4 April 2002

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Biodiversity Biodiversity (Communications arising (reply)): Suspect evidence of transgenic contamination/Maize transgene results in Mexico are artefacts (see editorial footnote)

David Quist & Ignacio H. Chapela

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Our original publication1 contained two separate conclusions derived from two methodological approaches. First, using PCR, we detected the presence of three distinct transgenic DNA sequences in maize landraces in Oaxaca, Mexico1. Second, we attempted to establish the genomic context of transgene insertion using i-PCR. The criticisms raised by Metz and Fütterer and by Kaplinsky et al. relate principally to our second statement.