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Electrophoresis of DNA amplified by PCR of lung nodule. Lanes: 1, ϕX174 RF/HaeII DNA fragment used as a size standard; 2, positive PCR result with lung nodule DNA amplified by fungal ITS1 primers; 3, negative PCR result with control human DNA and fungal ITS1 primers; 4 and 5, positive PCR results with DNA from lung nodule and control human DNA amplified with primers for the human androgen receptor.
