H2BC1 (Histone H2B type 1-C/E/F/G/I) is a gene that encodes a protein belonging to the histone H2B family, essential for packaging DNA into chromatin in the nuclei of eukaryotic cells. Histones such as H2B play a crucial role in regulating gene expression by controlling the accessibility of DNA to transcription factors and the transcriptional machinery. H2BC1 specifically contributes to the formation of the nucleosome core, where H2B proteins, together with histones H2A, H3, and H4, assemble into an octameric complex around which the DNA is wrapped.