Based on limited published evidence, H2AC4 is a histone H2A variant that functions as a structural constituent of chr6 and nucleosomes. Database annotations indicate it localizes to the nucleoplasm and nucleus, where it participates in DNA binding, chr6 organization, heterochromatin formation, and protein localization to CENP-A containing chr6. H2AC4 also exhibits protein binding activity and negative regulation of cell population proliferation functions. A recent proteomic study identified H2AC4 among differentially expressed proteins in colorectal cancer patients with Schistosoma japonicum co-infection 1, though its specific mechanistic role in this disease context requires further investigation.