PEX5 and hepatocellular carcinoma: To examine whether PEX5 mediates the effect of miR-31-5p on the radiation response, we cotransfected the miR-31-5p mimics with a PEX5 overexpression plasmid and observed that miR-31-5p-mediated reduction in the PEX5 level in HCC cells was rescued by the PEX5 overexpression plasmid (Figure S3A-B).