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Porcine endogenous retrovirus RNA in the supernatants. A and B: The representative results of reverse transcription-polymerase chain reaction (PCR) electrophoresis with the RNA extracted from the supernatants in Hep group and Nano group, respectively; C: The results of real time PCR. aP < 0.05. PERV: Porcine endogenous retrovirus; GAPDH: Glyceraldehyde 3-phosphate dehydrogenase.
