What is the key factor determining whether or not attenuation will occur when transcription of the

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The key factor determining whether or not attenuation will occur during the transcription of the E. coli trp operon is the level of trp-tRNA that is charged with tryptophan. When levels of charged trp-tRNA are high, indicating an abundance of tryptophan, the ribosome quickly translates the leader peptide, allowing the formation of a terminator structure in the mRNA that halts transcription (attenuation). Conversely, when charged trp-tRNA levels are low, indicating tryptophan scarcity, the ribosome stalls, and a different mRNA structure forms that allows transcription to continue.

What Is the Key Factor Determining Whether or Not Attenuation