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The Development of Targeted DNA Methylation Editing

Given the ability edit genes, why not also work on the ability to edit the epigenetic decorations such as DNA methylation, those that control the rate of gene expression, the production of proteins from the genetic blueprint? All cellular behavior is governed by the pace of production of specific proteins - these are the switches and dials of the cellular machine. So there are countless ways in which such an editing capability might prove useful.
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