FCM analysis revealed the PD‐L1 labeling efficacy of IFN‐γ‐treating tumor cells remarkably induced 82.8% to 31.9% by 1 μm of BMS‐1, which was attributed to the effective blocking of the combination of GL261 and α‐PD‐L1‐APC (Figure 4F). This evidence concerns the gene CD274 and neoplasm.