Our results showed that knockdown of PSMD9 increased the proportion of cells entering the G1 phase and decreased the proportion of cells entering the S phase, indicating that knockdown of PSMD9 induces cell cycle arrest at the G1 phase in HCC-LY10 and HCC-LM3 cells (Fig. 2I). The gene discussed is PSMD9; the disease is hepatocellular carcinoma.