YY2 and neoplasm: While YY2 overexpression alone or co‐culturing of control MC38 cells with CTLs increased the total cell death rate to ≈20%, co‐culturing MC38 cells overexpressing YY2 with CTLs increased it to more than 60% (Figure 3B), indicating that the inflammatory environment induced by YY2 overexpression boosted the cytotoxicity and tumor elimination capability of CTLs.