Section 2
Prokaryotic Gene Regulation
Book
Version 32
By Boundless
By Boundless
Boundless Biology
Biology
by Boundless
3 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/18985/square/figure-16-02-01.jpeg)
The trp Operon: A Repressor Operon
The trp operon is a repressor operon that is either activated or repressed based on the levels of tryptophan in the environment.
![Thumbnail](../../../../../../figures.boundless-cdn.com/18986/square/figure-16-02-02.jpeg)
Catabolite Activator Protein (CAP): An Activator Regulator
When glucose levels decline in E. coli, catabolite activator protein (CAP) is bound by cAMP to promote transcription of the lac operon.
![Thumbnail](../../../../../../figures.boundless-cdn.com/18987/square/figure-16-02-03.jpg)
The lac Operon: An Inducer Operon
The lac operon is an inducible operon that utilizes lactose as an energy source and is activated when glucose is low and lactose is present.