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 eukaryotic cell nuclei. Histones like H2B play a key role in regulating gene expression by controlling DNA accessibility to transcription factors and machinery. H2BC1 specifically contributes to forming the nucleosome core, where H2B proteins, together with histones H2A, H3, and H4, assemble into an octameric complex around which DNA is wrapped.