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| Description: Trp operon transcription regulation by the repressor, with tryptophan absent (a) and with tryptophan present (b)Trp operon transcription regulation by the repressor, with tryptophan absent (a) and with tryptophan present (b) (a) Tryptophan absent Transcription Polycistronic mRNA The inactive repressor does not Repressor bind trpO, and transcription of the (inactive) operon genes occurs. (b) Tryptophan present No transcription Active repressor The repressor is activated by the core- pressor tryptophan and binds trpO to block operon gene transcription. Q Tryptophan (corepressor) Picture Stats: Views: 36 Filesize: 270.45kB Height: 1364 Width: 1294 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=49278 |