Thursday, April 17, 2003

Comparing different methods of detecting transgenic DNA in corn, investigators found significant false negative results with all 6 methods. Why this is relevant: I don't pretend to have any idea how PCR really works in the lab, but the fact that every single method tested repeatedly failed to identify intentionally contaminated DNA should give you pause when you are told something is not transgenic; note also this is the opposite of the alleged false positives obtained by Quist and Chapela in the Oaxacan maize paper.
[Holden, et al., "Evaluation of Extraction Methodologies for Corn Kernel (Zea mays) DNA for Detection of Trace Amounts of Biotechnology-Derived DNA," J. Agric. Food Chem. 51 (2003): 2468-74.]

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