The results of most of these studies are presented in databases such as SysteMHC (https://systemhcatlas.org), a catalog of MHC-I epitopes generated by MS, standardized MHC allele-specific peptide spectral libraries and links to other proteomics and immunology databases (Shao et al., 2018), or caAtlas (http://www.zhang-lab.org/caatlas/) which combines 43 immunopeptidomes containing information from 311 cancer samples from nine different kinds of cancer and over 700 non-cancerous samples (Yi et al., 2021). This evidence concerns the gene HLA-C and cancer.