How does tryptophan,the end product of the trp operon,function in the regulation of the operon?

Question

Quizplus · Accepted Answer

Tryptophan functions as a corepressor in the regulation of the trp operon. When tryptophan levels are high, it binds to the repressor protein, which then allows the repressor-tryptophan complex to bind to the operator region of the trp operon. This binding prevents RNA polymerase from transcribing the operon, thus reducing the production of enzymes involved in tryptophan synthesis.

How Does Tryptophan,the End Product of the Trp Operon,function in the Regulation