Table of contents |
2 Example: Lac operon 3 See also |
An operon is a unit of transcription consisting of one or more structural genes, and two associated segments of DNA:
In summary:
The lac operon governs the production of enzymes for metabolizing lactose. In the absence of lactose, the Lac repressor substance binds to the operator, inhibiting the production of three enzymes. Lactose, however, represses the repressor, allowing the enzymes to be produced.
The operon as a unit of transcription
Example: Lac operon
See also