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(A) Positions of the two primer pairs for genotype identification. Genomic DNA from Piglet 2, 3, 4, 6, 7, 9, 10 was extracted, whereas ZC (B) and TG (C) bicistronic cassettes in the genome were detected by PCR using appropriate primers. Lane 1, DNA marker; lane 2, positive control; lane 3, negative control; lane 4–10, genomic DNA from Piglet 2, 3, 4, 6, 7, 9 and 10.
