GSTZ1 and hepatocellular carcinoma: Functional studies indicated that GSTZ1 overexpression (GSTZ1‐OE) significantly repressed the migration of both Huh7 and SK‐Hep1 cells, whereas GSTZ1 knockout promoted HCC cell migration compared with parental SNU449 cells, as shown in the transwell and wound healing assays (Figure S1D–I).