Vim li cas tryptophan operon raug kaw thaum muaj tryptophan? Tryptophan khi rau thiab ua kom cov protein ntau repressor; cov repressor proteins, nyob rau hauv lem, khi rau tus neeg teb xov tooj, tiv thaiv transcription.
Yuav ua li cas rau trp operon Thaum tryptophan tshwm sim?
Tus trp operon tau nthuav tawm (tig "rau") thaum tryptophan qib qis thiab tsuj (tig "tawm") thaum lawv siab. Lub trp operon yog tswj los ntawm trp repressor. Thaum khi rau tryptophan, trp repressor thaiv kev qhia ntawm operon.
tryptophan hloov li cas ntawm trp operon?
Tus neeg teb xov tooj ib ntus yog encoded ntawm cheeb tsam txhawb nqa thiab thawj trp-coding noob. Lub trp operon raug txwv thaum tryptophan qib siab los ntawm kev khi cov protein repressor rau tus neeg teb xov tooj sib lawv liag ntawm tus corepressor uas thaiv RNA polymerase los ntawm kev sau cov noob caj noob ces trp.
Vim li cas trp operon tsuas yog qhib thaum tryptophan tsis tuaj ntawm lub xov tooj?
Thaum tryptophan qib siab txaus, cov amino acid yuav pib inhibiting nws tus kheej synthesis thiab transcription yuav nres. … Tryptophan qhov tsis tuaj yeem hloov ntawm trp operon. Tryptophan ua raws li corepressor, yog li nyob rau hauv nws lub xub ntiag lub operon tseem hloov tawm.
Puas yog trp operon feem ntau qhib lossis tawm?
No operon yog ib txwm muab tua tshwj tsis yog ib qho inducer-lactose-yog muaj los ntawm ib puag ncig; lactose ua rau kev nthuav tawm ntawm cov noob hauv cov operon no. Lub trp operon yog ib tug repressible system; qhov operon no yeej ib txwm qhia tshwj tsis yog tias tryptophan, lub corepressor, yuav muaj nyob rau hauv lub cell.
