Answer :
When, where, and how much a gene is expressed in a cell depends on the histones and epigenetic elements working together.
Who or what are histone protein factors?
In eukaryotic cells, there are proteins called histones that serve two purposes. They support the maintenance of DNA in a compact state and control the loosening the tightening of DNA strands, which controls the expression of genes.
How do epigenetic factors work?
Epigenetic factors are substances that alter the gene to control how a gene expresses itself. Both of these modifications are not heritable and do not result in mutations. These are transient alterations such DNA remodeling, methylation, and alkylation, among others.
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