Using limma, GSVA, GSEABase, pheatmap, and reshape2 packages to analyze the immune-related functions of cuprotosis-related risk genes in GC, it was found that the immune functions of GC were mainly concentrated in APC coinhibition, APC costimulation, CCR, checkpoint, cytolytic activity, HLA, inflammation-promoting, MHC class I, parainflammation, T cell coinhibition, T cell costimulation, type I IFN reponse, type II IFN reponse, etc. The relevant heatmap is shown in Figure 6(a). Here, HLA-C is linked to gastric cancer.