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    GlossaryEpigenetic Mark

    chemical change to DNA or histones affecting gene activity

    An epigenetic mark, also known as an epigenetic modification, is a chemical change to DNA or histone proteins that affects gene activity without altering the underlying DNA sequence. These marks, such as DNA methylation or histone acetylation, can turn genes on or off and are influenced by environmental factors, playing a crucial role in development, disease, and inheritance.

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