How Does Attenuation Control Tryptophan Operon?

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