Next, we co‐cultivated Renca cells with CD8+ T cells by a 1:3 ratio for 24 hours (Figure 5E) and found that a higher Annexin V positive proportion in the Renca cells transfected with the B2M‐Overexpression group while the remaining tumor cell numbers were lower than those in the vehicle group (Figure 5F,G). The gene discussed is CD8A; the disease is neoplasm.