Then, we used the GEPIA2021 database to investigate the effect of PGK1 expression on different sub-types of the same immune cell type in tumor and normal tissues and found that PGK1 was highly expressed in immunosuppressive and resting cells, including M2 macrophages, resting dicentric cells, resting mast cells, and so on (Figure S7A–E). The gene discussed is PGK1; the disease is neoplasm.