Cov kab mob puas muaj cov ntsiab lus hloov pauv?
Cov kab mob puas muaj cov ntsiab lus hloov pauv?

Video: Cov kab mob puas muaj cov ntsiab lus hloov pauv?

Video: Cov kab mob puas muaj cov ntsiab lus hloov pauv?
Video: 6 Nqi Lus Qhia Kev Ua neej ( leej twg mloog lub neej yuav zoo tuaj) 2024, Kaum ib hlis
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Kev sau ntawv yog ua los ntawm RNA polymerase tab sis nws qhov tshwj xeeb yog tswj los ntawm cov kab ke tshwj xeeb DNA khi cov proteins hu ua cov ntsiab lus ntawm kev txhais lus . Kab mob vam khom heev kev sau ntawv thiab kev txhais lus los tsim cov proteins uas pab lawv teb tshwj xeeb rau lawv ib puag ncig.

Kuj kom paub yog, qhov twg yog qhov transcription yam pom?

Transcription yam yog ib tsev neeg muaj protein ntau ntau thiab feem ntau ua haujlwm hauv ntau subunit protein complexes. Lawv tuaj yeem khi ncaj qha rau cov cheeb tsam tshwj xeeb "txhim kho" ntawm DNA, uas nyob rau sab saud ntawm thaj chaw coding hauv cov noob, lossis ncaj qha rau RNA polymerase molecule.

Ib tug kuj yuav nug, dab tsi yog lub luag haujlwm tseem ceeb ntawm kev hloov pauv? Hauv molecular biology, a transcription factor (TF) (los yog ib ntus tshwj xeeb DNA-binding yam ) yog cov protein uas tswj tus nqi ntawm kev sau ntawv ntawm cov ntaub ntawv caj ces los ntawm DNA mus rau tus tub txib RNA, los ntawm kev khi rau ib qho DNA ib ntus.

Kuj paub, dab tsi yog qhov kev hloov pauv dav dav thiab lawv ua haujlwm li cas?

A transcription factor yog ib qho protein uas khi rau DNA ib ntus (txhim kho lossis txhawb nqa), ib leeg lossis nrog lwm cov proteins hauv qhov nyuaj, rau tswj tus nqi ntawm kev sau ntawv cov ntaub ntawv genetic los ntawm DNA rau neeg xa xov liaison RNA los ntawm kev txhawb nqa (ua haujlwm ua haujlwm) lossis thaiv (ua haujlwm raws li tus neeg tawm tsam)

Cov kab mob puas muaj cov tshuaj tiv thaiv?

Ib zaug xav tias nws yog tshwj xeeb rau eukaryotes, ua kom zoo -zoo li cov ntsiab lus muaj tau pom nyob rau hauv ntau yam ntawm kab mob . Cov kev tswj hwm cov proteins uas khi rau cov no Cov kab mob ua kom zoo yuav tsum hu rau RNA polymerase kom qhib cov ntawv sau. Paradigms rau txhua txoj hauv kev no muaj nyob hauv kab mob tshuab.

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