H2BC5 (Histone Cluster 2, H2bc5): H2BC5 is a protein that belongs to the histone H2B family. These proteins play a crucial role in packaging and organising DNA within the nucleus of eukaryotic cells. H2BC5 aids in forming nucleosomes, the basic repeating units of chromatin, where DNA is wrapped around a core of histone proteins. Through various modifications, H2BC5 and other histones regulate gene expression, DNA replication, and repair, contributing to the dynamic structure and function of chromosomes.