Video: Lub luag haujlwm ntawm ion twj tso kua mis yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
muaj nuj nqi hauv hlwb
(los ntawm kev ua haujlwm ntawm ib ion twj , piv txwv li), lub solute yuav rov qab mus rau nws qub concentration thiab lub xeev ntawm siab dawb zog. Cov twj tsis tu ncua txav sodium ions tawm ntawm lub cell thiab poov tshuaj ions mus rau hauv lub cell.
Hais txog qhov no, lub twj tso kua mis ion ua dab tsi?
Ion twj tso kua mis yog electro-physical nqus tsev vacuum twj uas tshem cov pa roj tawm ntawm lawv ib puag ncig los ntawm kev tig lawv mus rau hauv cov khoom siv.
Ib yam li ntawd, ion twj tso kua mis yog dab tsi? P-class ion twj muaj cov transmembrane catalytic α subunit, uas muaj qhov chaw ATP-binding site, thiab feem ntau yog ib qho me me β subunit, uas tej zaum yuav muaj kev tswj xyuas. Ntau yam ntawm no twj yog tetramers muaj li ntawm ob α thiab ob β subunits.
Hauv qhov no, 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.
Lub twj tso kua mis ion thauj khoom li cas?
Cov twj siv lub zog pub dawb xws li ATP lossis lub teeb kom tsav lub thermodynamically nce toj thauj ntawm ions los yog molecules . Pump kev ua yog ib qho piv txwv ntawm active thauj . Channels, nyob rau hauv sib piv, pab ions ntws sai los ntawm daim nyias nyias nyob rau hauv ib tug downhill kev taw qhia.
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
Ion twj tso kua mis yog dab tsi?
P-chav kawm ion twj tso kua mis muaj ib tug transmembrane catalytic α subunit, uas muaj ib tug ATP-binding site, thiab feem ntau yog ib tug me me β subunit, uas tej zaum yuav muaj kev tswj kev khiav hauj lwm. Ntau lub twj tso kua mis no yog tetramers uas muaj ob lub α thiab ob lub β subunits
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Cov twj tso kua mis, tseem hu ua transporters, yog transmembrane proteins uas nquag txav ions thiab / los yog cov kuab tshuaj tiv thaiv ib qho concentration lossis electrochemical gradient hla cov kab mob lom. Cov twj tso kua mis tsim kom muaj peev xwm ntawm daim nyias nyias los ntawm kev tsim cov tshuaj electrochemical gradient thoob plaws daim nyias nyias
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