염기서열이 변화하지 않는 상태에서 이루어지는 유전자 발현의 조절을 연구
In biology, epigenetics is the study of stable changes in cell function that do not involve alterations in the DNA sequence. The Greek prefix epi- in epigenetics implies features that are "on top of" or "in addition to" the traditional genetic basis for inheritance. Epigenetics most often involves changes that affect the regulation of gene expression, and that persist through cellular division. Such effects on cellular and physiological phenotypic traits may result from external or environmental factors, or be part of normal development. It can also lead to diseases such as cancer.