This is unsurprising, as B16 melanoma cells express low levels of major histocompatibility complex class I.36Our results show no statistically significant differences in the number of tumor nodules detected on the surfaces of lungs of BAFF−/− or BAFF Tg mice versus the WT controls (Figure 4a), demonstrating that BAFF had no detectable impact on NK cell–mediated control of tumor burden in the lungs. The gene discussed is TNFSF13B; the disease is neoplasm.