RBM15 and hepatocellular carcinoma: We found that knockdown of RBM15 inhibited the proliferation capability of HCC cells according to Cell Counting Kit-8 (CCK-8) and colony-formation assays (Figs. 3a, b and S3a), and 5-ethynyl-2′-deoxyuridine (EdU) assay also confirmed that RBM15 promoted cell growth in vitro (Figs. 3c, d and S3b).