NUMB and hepatocellular carcinoma: Immunohistochemistry showed that DRP1 and CD44 were downregulated in the xenografted tumors formed by YY2‐overexpressed HCC‐LM3 cells, in which Numb was upregulated; whereas DRP1 overexpression restored CD44 levels and resuppressed Numb (Figure 8D; Figure S16C–F, Supporting Information).