Repression

repression
The inhibition of a gene’s expression, this is typically caused by the change in the activity of a regulatory protein.
The act of repressing; control by holding down; his goal was the repression of insolence.(psychiatry) the classical defense mechanism that protects you from impulses or ideas that would cause anxiety by preventing them from becoming conscious.A type of state a gene can exist in when repressed by a repressor molecule rendering the gene inactive.