The methylation of Deoxyribonucleic acid (DNA) and modifications of histone are included in Epigenetic marks. These marks are found on DNA and histones. They are said to be effective on chromatin structure and expression of genes.
The nucleosome containing methylated histone H3 is termed as Heterochromatin. The production of heterochromatin requires interaction of heterochromatin protein-1 with specific epigenetic marks. The regions of euchromatin are insulated from the regions of heterochromatin by the proteins that are in association with specific DNA sequence. So, the epigenetic marks are inherited along with chromatin structures. These marked histones are mixed with new unmarked ones to make daughter strands available with both marked and unmarked histones.
The regions of euchromatin are insulated from the regions of heterochromatin by the proteins that are in association with specific DNA sequence. So, the epigenetic marks are inherited along with chromatin structures. These marked histones are mixed with new unmarked ones to make daughter strands available with both marked and unmarked histones. The modification of newly formed histones is guided by the codes of old histones. This enables to remember the chromatin state and to inherit to next generation.