The violin plot was utilized to recognize the variety of 22 immune cells between the high and the low expression groups in HCC samples ground on the median expression level of NAP1L1. Furthermore, from observing those violin plots (Figure 7B, Supplementary Figures S5B, S6B, S7B), we found a remarkable difference in activated memory CD4 T cells, activated dendritic cells, gamma delta T cells, regulatory T cells (Tregs), CD8 T cells, activated NK cells, monocytes, M0 macrophages, M1 macrophages, and M2 macrophages. The gene discussed is CD8A; the disease is hepatocellular carcinoma.