CD274 and leukemia: The increase in liver weight due to metastatic nodules was higher in F1 recipients implanted with A20 PD-L1 WT leukemia cells than in those injected with A20 PD-L1 KO leukemia cells (Figure 4A, ***p < 0.0005) or naive F1 controls (Figure 4A, *p < 0.05).