The level of CD107a expression on NK cells following contact of K562 cells was comparable to controls in both inactive (14.1 ± 1.3% vs. 13.4 ± 2.2%, p = 0.797) and active (13.1 ± 1.6% vs. 13.4 ± 2.2%, p = 0.982) SLE patients (Figure 7(a)). Here, LAMP1 is linked to systemic lupus erythematosus.