Video: Lub luag haujlwm ntawm 5 cap thiab poly A Tail yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov 5 ' cap tiv thaiv lub nascent mRNA los ntawm degradation thiab pab nyob rau hauv ribosome khi thaum txhais lus. Cov poly (A) tail tiv thaiv mRNA los ntawm degradation, pab nyob rau hauv lub export ntawm mRNA paub tab mus rau lub cytoplasm, thiab koom nyob rau hauv binding proteins koom tes nyob rau hauv pib txhais lus.
Tsis tas li lo lus nug yog, qhov ua haujlwm ntawm poly A Tail yog dab tsi?
Muaj nuj nqi . Hauv nuclear polyadenylation , a poly (A) tail ntxiv rau RNA thaum kawg ntawm kev sau ntawv. Hauv mRNAs, lub poly (A) tail tiv thaiv mRNA molecule los ntawm enzymatic degradation nyob rau hauv lub cytoplasm thiab pab nyob rau hauv transcription termination, export ntawm mRNA los ntawm lub nucleus, thiab kev txhais lus.
Yuav ua li cas yog lub poly A tail ntxiv rau pre mRNA Lub hom phiaj ntawm poly A Tail yog dab tsi? PAP ntxiv kwv yees li 10 adenine nucleotides mus rau qhov kawg ntawm 3' ua ntej - mRNA molecule. Qhov sib ntxiv ntawm luv poly (A) tail tso cai rau kev khi ntawm cov poly (A) binding protein (PABII) to the qab . PABII nce tus nqi ntawm polyadenylation , uas tom qab tso cai rau ntau PABII protein los khi cov qab.
Ib yam li ntawd, tib neeg nug, dab tsi yog lub luag haujlwm ntawm lub hau thiab tus Tsov tus tw ntawm eukaryotic mRNA?
- Lawv koom nrog hauv kev ua kom nrawm ntawm kev txhais lus los ntawm ribosome. - Lawv koom nrog hauv kev tshem tawm exons los ntawm mRNA. - Lawv koom nrog tiv thaiv kev txhais lus ntawm mRNA kom txog thaum nws tawm mus nucleus.
Yuav ua li cas ntxiv poly A Tail?
poly-A tail . Cov poly-A tail yog ib txoj hlua ntev ntawm adenine nucleotides uas yog ntxiv mus rau tus tub txib RNA (mRNA) molecule thaum lub sij hawm RNA ua kom muaj kev ruaj ntseg ntawm cov molecule. Tom qab ntawd ib qho enzyme hu ua poly - Ib qho polymerase ntxiv ib tug saw ntawm adenine nucleotides rau RNA.
Pom zoo:
Lub luag haujlwm ntawm CDK yog dab tsi hauv lub cev ua haujlwm ntawm tes tshwj xeeb hauv lub voj voog ntawm tes?
Los ntawm phosphorylation, Cdks teeb liab lub xov tooj ntawm tes uas nws tau npaj kom dhau mus rau theem tom ntej ntawm lub voj voog ntawm tes. Raws li lawv lub npe qhia, Cyclin-Dependent Protein Kinases yog nyob ntawm cyclins, lwm chav kawm ntawm kev tswj hwm cov protein. Cyclins khi rau Cdks, ua kom cov Cdks rau phosphorylate lwm cov molecules
Dab tsi yog lub luag haujlwm thiab cov haujlwm niaj hnub ntawm tus kws tshuaj ntsuam xyuas DNA?
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Lub luag haujlwm ntawm poly A Tail yog dab tsi?
Muaj nuj nqi. Hauv nuclear polyadenylation, poly(A) tus Tsov tus tw yog ntxiv rau RNA thaum kawg ntawm kev sau ntawv. Ntawm mRNAs, poly(A) tus Tsov tus tw tiv thaiv mRNA molecule los ntawm enzymatic degradation nyob rau hauv lub cytoplasm thiab pab nyob rau hauv transcription termination, export ntawm mRNA los ntawm lub nucleus, thiab kev txhais lus
Lub luag haujlwm ntawm lub cev thiab lub cev yog dab tsi?
Anatomy yog kev kawm txog cov qauv thiab kev sib raug zoo ntawm lub cev. Physiology yog kev kawm txog kev ua haujlwm ntawm lub cev thiab lub cev tag nrho