E. coli tryptophan operon (trp) has five genes, but, if tryptophan is at high levels, only short transcription {leader, DNA} can happen {attenuation}. Leader makes hairpin that stops transcription. If tryptophan is low, full operon transcribes, because different hairpin has few tryptophans.
Physical Sciences>Chemistry>Biochemistry>Nucleic Acid>Transcription
5-Chemistry-Biochemistry-Nucleic Acid-Transcription
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Date Modified: 2022.0224