To address whether the PCNA pseudogenes were subjected to HBV expression, we prepared total RNAs from HBV-negative (HBV-) hepatoma cells (HepG2, HepaRG and HepAD38) and HBV-expressing (HBV+) hepatoma cells (termed as HepG2*/HepaRG*/HepAD38* and HepG2.2.15). Here, PCNA is linked to hepatocellular carcinoma.