Section 18
Global Regulatory Mechanisms
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Boundless Microbiology
Microbiology
by Boundless
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Transcription in Prokaryotes
The genetic code is a degenerate, non-overlapping set of 64 codons that encodes for 21 amino acids and 3 stop codons.
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.
The Stringent Response
The stringent response is a stress response that occurs in bacteria in reaction to amino-acid starvation or other stress conditions.
Repression of Anabolic Pathways
Repression of anabolic pathways is regulated by altering transcription rates.
The AraC Regulator
The L-arabinose operon, also called ara operon, encodes enzymes needed for the catabolism of arabinose to xylulose 5-phosphate.