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  • tryptophan
  • The trp operon is an operon-a group of genes that is used, or transcribed, together-that codes for the components for production of tryptophan. (wikipedia.org)
  • The operon is regulated so that when tryptophan is present in the environment, the genes for tryptophan synthesis are not expressed. (wikipedia.org)
  • While the lac operon can be activated by a chemical (allolactose), the tryptophan (Trp) operon is inhibited by a chemical (tryptophan). (wikipedia.org)
  • sequence
  • At the beginning of the transcribed genes of the trp operon is a sequence of at least 130 nucleotides termed the leader transcript (trpL). (wikipedia.org)