How Is The Trp Operon Regulated?
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