Repression

{
  "id": "MLC-T-CHM-010202",
  "term": "Repression",
  "field": "Chemistry",
  "definition": "The decrease in the rate of synthesis of an enzyme or other protein in a cell, typically in response to the presence of a specific molecule. This regulatory mechanism controls gene expression by preventing the transcription of messenger RNA from a gene. For example, the presence of tryptophan represses the enzymes involved in its synthesis.",
  "subject": "Chemistry and the Environment",
  "see_also": [
    "enzyme repression",
    "gene",
    "messenger RNA",
    "operon",
    "sequence",
    "transcription"
  ],
  "references": [
    "PAC, 1992, 64, 143. 'Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992)' on page 164 (https://doi.org/10.1351/pac199264010143)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/repression/"
}