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| Reduction in the length of telomeres leading to cellular aging. | | Reduction in the length of telomeres leading to cellular aging. | ||
|- | |- | ||
|[[File:Epigenome.png|frameless| | |[[File:Epigenome-transparent-upscale.png|frameless|85x85px]] | ||
| '''Epigenetic alterations''' | | '''Epigenetic alterations''' | ||
| Changes in DNA methylation and histone modification affecting gene expression. | | Changes in DNA methylation and histone modification affecting gene expression. |