Influence of chitosan nanofiber scaffold on porcine endogenous retroviral expression and infectivity in pig hepatocytes

Figure 3 Representative results of polymerase chain reaction electrophoresis with the DNA extracted from human embryo kidney 293 cells of in vitro infection experiments. C+: Porcine endogenous retrovirus-infected human embryo kidney 293 cells; C-: Pure water. The ladder ranged from 100 to 600 bp. “Hep” and “Nano” meant the incubating supernatant from the simple culture of hepatocytes and the hepatocyte culture on chitosan nanofiber scaffolds. SsCytB: Sus scrofa cytochrome B.