DNA methylation

noun

Definition of DNA methylation

: the enzymatically controlled methylation of a nucleotide base (such as cytosine in eukaryotes) in a molecule of DNA that plays a role in suppressing gene expression
  • A process called DNA methylation sets down "marks" on bits of DNA and is typically thought to squelch gene expression.
  • —Sarah Baldauf
  • DNA methylation is a mark on genomic DNA made by addition of methyl groups to cytosine bases …
  • —Adrian Bird

First Known Use of dna methylation

1963

in the meaning defined above

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Medical Dictionary

DNA methylation

noun

medical Definition of DNA methylation

: the enzymatically controlled methylation of a nucleotide base (as cytosine in eukaryotes) in a molecule of DNA that plays a role in suppressing gene expression

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