Chemicals and Drugs

Lac Repressors

Bacterial repressor proteins that bind to the LAC OPERON and thereby prevent the synthesis of proteins involved in catabolism of LACTOSE. When lactose levels are high lac repressors undergo an allosteric change that causes their release from the DNA and the resumption of lac operon transcription.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Bacterial repressor proteins that bind to the LAC OPERON and thereby prevent the synthesis of proteins involved in catabolism of LACTOSE. When lactose levels are high lac repressors undergo an allosteric change that causes their release from the DNA and the resumption of lac operon transcription.

MeSH Record

Classification

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MeSH Record

Synonyms

5 entry terms
  • Lac Repressor
  • LacI Proteins
  • Proteins, LacI
  • Repressor, Lac
  • Repressors, Lac

MeSH Record

Aspects Covered

30 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.

MeSH Record

History Note

2010; use REPRESSOR PROTEINS 1979-2009

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AMA Style

References

  1. National Library of Medicine. Lac Repressors. Medical Subject Headings (MeSH). 2026. Unique ID D056968. http://id.nlm.nih.gov/mesh/2026/D056968
  2. Lac Repressors. In: Wikipedia. https://en.wikipedia.org/wiki/Lac_repressor
  3. Lac Repressors. In: Wikidata. https://www.wikidata.org/wiki/Q4345509