👉 In genetics, a histone is a protein that is involved in the regulation of gene expression. Histones are composed of two proteins (H1 and H2) that bind to DNA and regulate gene expression through various mechanisms. These include methylating hydrogen atoms on lysine residues within the nucleotide sequence of a gene, which can influence its expression or repression. Understanding histone function is important for understanding how genes are expressed and regulated in various cell types.
