Ion twj tso kua mis yog dab tsi?
Ion twj tso kua mis yog dab tsi?

Video: Ion twj tso kua mis yog dab tsi?

Video: Ion twj tso kua mis yog dab tsi?
Video: Tshuaj theem vim li cas thiaj tau nqi ?/ Siv kho mob dab tsi?/paris polyphylla use for? 2024, Kaum ib hlis
Anonim

P-class ion twj muaj cov transmembrane catalytic α subunit, uas muaj qhov chaw ATP-binding, thiab feem ntau yog ib qho me me β subunit, uas tej zaum yuav muaj kev tswj hwm kev ua haujlwm. Ntau yam ntawm no twj yog tetramers tsim ntawm ob α thiab ob β subunits.

Tsis tas li ntawd, ion twj tso kua mis ua dab tsi?

Hauv biology, ib ion transporter (los yog ion twj ) yog transmembrane protein uas txav mus ions hla ib cov kab mob lom tiv thaiv lawv cov concentration gradient los ntawm kev thauj mus los.

Kuj Paub, yog ion twj tso kua mis nquag los yog passive? Cov twj yog ib hom nquag thauj uas pom ions thiab molecules tiv thaiv lawv cov concentration gradient. Protein channels uas undergo passive thauj ua haujlwm tawm tsam cov twj , tso cai rau sodium ions nkag mus rau hauv lub cell tas li, yog li cov twj ua hauj lwm kom tshem tawm qhov tshaj ions.

Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog membrane twj tso kua mis?

Teb thiab piav qhia: Cov channel thiab twj uas hla lub cell daim nyias nyias yog ua tawm ntawm cov protein. Cov proteins tuaj yeem quav rau hauv cov qauv uas tso cai rau cov ntaub ntawv dhau mus

Cov twj ion puas xav tau lub zog?

Cov protein pores no tsuas yog txav mus ions down lawv concentration gradient. Ion channels tau hais tias "passive" vim tsis yog zog (ATP) yog xav tau txhawm rau qhib cov protein, tsuas yog ligand lossis hloov pauv hauv qhov hluav taws xob. Ion twj tso kua mis Ntawm qhov tod tes, yog active proteins.

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