Histone Modification

Histone modification is an important process in the regulation of gene expression in eukaryotes. It involves the addition and removal of chemical groups called epigenetic modifications to the amino acids that form the core of a histone, a type of protein that the DNA wraps around to form the structure of the chromosomes within the cell. These modifications can result in the changes in gene expression without altering the underlying genetic code of the organism. This epigenetic regulation is involved in a variety of processes including DNA repair, transcriptional repression and activation, cell differentiation, and chromatin remodeling and can have a profound effect on the development and behavior of organisms. Through this process, certain genes can be silenced, while others can be activated, allowing the organism to respond to environmental cues and stresses.