It is interesting to speculate that whether E3 ligase TRIM26 with ubiquitin function has a common foothold with USP39, that is, TRIM26 affects the stability of ZEB1 through ubiquitination, while USP39 promotes the abnormality of ZEB1 level through deubiquitination, which orchestrates the occurrence of EMT and determines the progression of HCC. The gene discussed is USP39; the disease is hepatocellular carcinoma.