GZMB and neoplasm: The FACS analysis showed that the killing percentage of SRC‐1‐deficient tumor cells (KOSRC‐1+OVA) was higher than that of the corresponding Ctrl group (Figure 2E, upper), and the effector functions of CD8+ T cells in KOSRC‐1+OVA group were stronger as proved by the elevated levels of GZMB and TNFα in CD8+ T cells (Figure 2E, middle and lower).