After examining the pulled‐down proteins by lncRNA ARHGAP5‐AS1 using mass spectrometry proteomics, we identified multiple cancer‐related proteins including CSDE1, ZC3HAV1, CCT8, CKAP4, PARP1, PEG10 and APEX1 in HepG2 (Table S6). This evidence concerns the gene CCT8 and cancer.