trp operon

How Is The Trp Operon Regulated?

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How Is The Trp Operon Regulated? Regulation of the trp operon is determined by the concentration of tryptophan; when adequate tryptophan is present in the growth medium, there is no need for tryptophan biosynthesis. Transcription is turned off when a high concentration of tryptophan is present, and is turned on when tryptophan is absent. How

How Does Attenuation Control Tryptophan Operon?

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How Does Attenuation Control Tryptophan Operon? When levels of tryptophan are high, attenuation causes RNA polymerase to stop prematurely when it’s transcribing the trp operon. Only a short, stubby mRNA is made, one that does not encode any tryptophan biosynthesis enzymes. How does attenuation regulate gene expression? Attenuation is a regulatory feature found throughout Archaea