LAMP1 and neoplasm: The percentage of CD107a+ NK cells, against all three tumor targets, decreased in a pO2-dependent manner (Figure 1B; pO2 of 20, 1.5, and 0.5% corresponded to 85.7, 55.5, and 36.2%, respectively, for K562; 34.4, 28.98, and 16.92%, respectively, for CEM; and 47.4, 34.4, and 18.09%, respectively, for A375).