Methylation

{
  "id": "MLC-T-ENV-017140",
  "term": "Methylation",
  "field": "Environment",
  "definition": "1. A chemical reaction in which a small molecule called a methyl group is added to other molecules. Methylation of proteins or nucleic acids may affect how they act in the body.\n\n2. The attachment of methyl groups to DNA at cytosine bases; correlated with reduced transcription of the gene and thought to be the principal mechanism in X-chromosome inactivation and imprinting.",
  "references": [
    "National Cancer Institute Glossary",
    "NIH Genetics Home Reference Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/methylation/"
}