Lub quaternary qauv ntawm hemoglobin yog dab tsi?
Lub quaternary qauv ntawm hemoglobin yog dab tsi?

Video: Lub quaternary qauv ntawm hemoglobin yog dab tsi?

Video: Lub quaternary qauv ntawm hemoglobin yog dab tsi?
Video: Niam xa me tub tuaj mus kawm nthawv 9/12/2017 2024, Kaum ib hlis
Anonim

Hemoglobin muaj ib quaternary qauv . Nws muaj ob khub ntawm cov protein sib txawv, tsim cov α thiab β chains. Muaj 141 thiab 146 amino acids nyob rau hauv α thiab β chains ntawm hemoglobin , raws. Raws li nyob rau hauv myoglobin, txhua subunit yog txuas covalently rau ib tug molecule ntawm heme. Yog li, hemoglobin khi plaub O2 molecules.

Nyob rau hauv tas li ntawd, dab tsi yog lub quaternary qauv ntawm ib tug protein?

Nqe lus piav qhia thiab piv txwv. Ntau cov proteins Qhov tseeb yog cov sib dhos ntawm ntau cov saw hlau polypeptide. Cov quaternary qauv hais txog tus naj npawb thiab kev npaj ntawm cov protein ntau subunits nrog kev hwm rau ib leeg. Piv txwv ntawm cov proteins nrog quaternary qauv suav nrog hemoglobin, DNA polymerase, thiab ion channels.

Qhov thib ob, yog vim li cas hemoglobin A quaternary qauv protein? Cov qauv rau hemoglobin Nws zoo ib yam li myoglobin tshwj tsis yog tias nws muaj quaternary qauv vim muaj plaub protein ntau chain subunits. Txhua protein ntau chain subunit muaj ib pab pawg heme nrog cov hlau txuas. Txhua hemoglobin molecule tuaj yeem khi rau tag nrho plaub lub pa oxygen molecules.

Ib tug kuj yuav nug, puas yog hemoglobin ib tug tertiary los yog quaternary qauv?

Hemoglobin yog tetramer uas muaj a quaternary qauv muaj ntau yam folded polypeptide cov qauv ( tsev kawm ntawv qib siab ). A kawm ntawv qib siab cov protein feem ntau yuav muaj ib txoj hlua polypeptide nrog ib lossis ntau dua cov qauv.

Lub luag haujlwm ntawm quaternary qauv yog dab tsi?

Kev ua haujlwm ntawm Quaternary Structure Raws li tau hais los saum no, quaternary qauv tso cai rau a protein ntau kom muaj ntau yam haujlwm. Nws kuj tso cai rau ib protein ntau mus rau qhov nyuaj conformational hloov. Qhov no muaj ntau yam mechanisms. Ua ntej, ib tus neeg subunit tuaj yeem hloov cov duab.

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