Based on limited published evidence, H2BC4 (H2B clustered histone 4) is a histone protein involved in chr6 structure. H2BC4 was identified as a potential candidate gene associated with spontaneous abortion through copy number variant analysis, alongside other histone variants (H2AC7, H3C8, H4C3) enriched in chr6 structural components 1. Additionally, H2BC4 was identified as a survival-related differentially expressed gene in pancreatic adenocarcinoma, though its specific mechanistic role in tumor immunity requires further investigation 2. The precise molecular functions of H2BC4 remain to be comprehensively characterized.