CD8A and melanoma: The percent inhibition of CD8+ T cell proliferation in the presence of melanoma cell lines was significantly lower in effector cells (% of inhibition ± SD: 1.83 ± 3.17) than in memory (22.38 ± 4.15, p = 0.005) and naive (44.12 ± 11.9, p = 0.03) CD8+ T cells (Figure 5, panel A).