OTUB1 and hepatocellular carcinoma: Additionally, the results of expression analysis on the data of Chinese Human Proteome Project (CNHPP) [31] (110 paired tumor and nontumor tissues of clinical early‐stage HCC) showed consistently upregulation of protein level of OTUs (including OTUD7B, OTUD6B, ALG13, OTUB1, OTULIN) in HCC tissues (Table S2 and Figure S1B, Supporting Information).