2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Txawm hais tias proteins tseem ceeb hauv txoj kev teeb liab, lwm hom molecules tuaj yeem koom nrog. Ntau txoj hauv kev koom nrog cov tub txib thib ob, me me, tsis muaj protein ntau molecules uas dhau los ntawm lub teeb liab pib los ntawm kev khi ntawm ib lub ligand ("tus tub txib thawj") rau nws cov receptor.
Cov proteins puas tuaj yeem taw qhia cov molecules?
Signaling molecules tuaj yeem muaj los ntawm cov proteins me rau cov ions methiab tuaj yeem ua hydrophobic, dej-soluble, lossis txawm tias roj.
YYuav ua li cas cov proteins koom nrog hauv kev hloov pauv?
Signal transduction yog cov txheej txheem los ntawm cov tshuaj lom neeg lossis lub cev teeb liab kis tau los ntawm lub xovtooj ntawm tes raws li cov xwm txheej molecular, feem ntau cov protein phosphorylation catalyzed los ntawm protein kinases, uas thaum kawg ua rau cov lus teb ntawm tes.
Lub luag haujlwm ntawm kev hloov pauv cov protein nyob rau hauv txoj kev xaim hluav taws xob yog dab tsi?
Kev hloov pauv hauv qib protein, qhov chaw muaj protein ntau, kev ua haujlwm ntawm cov protein, thiab kev sib cuam tshuam ntawm cov protein-protein yog qhov tseem ceeb ntawm cov teeb liab hloov pauv, tso cai rau cov hlwb los teb cov lus tshwj xeeb rau qhov ze li qhov tsis muaj kev txwv thiab kuj sib txawv. qhov rhiab heev, ncua sij hawm, thiab lub zog ntawm cov lus teb.
teeb liab kis tau tshwm sim nyob qhov twg?
Txoj kev xaim hluav taws xob cuam tshuam cuam tshuam nrog kev sib txuas ntawm cov khoom siv hluav taws xob ntxiv thiab ligands rau receptors nyob rau ntawm lub xovtooj ntawm tes lossis hauv lub cell uas ua rauCov xwm txheej hauv lub xov tooj ntawm tes, kom tau txais cov lus teb. Cov lus teb tuaj yeem hloov pauv cov cell metabolism, zoo li, thiab cov noob qhia (Krauss, 2006).
Pom zoo:
Lub teeb liab teeb liab yog dab tsi?
raug liam tias mus dhau lub teeb liab, lossis ua txhaum cov paib tsheb lossis cov cim kev, tab tom ua txhaum ntau zuj zus. Cov kev ua txhaum cai no raug kuaj pom los ntawm kev soj ntsuam ntawm Tub Ceev Xwm thiab / lossis los ntawm kev siv lub koob yees duab.
Puas liab liab tshuaj yej hloov?
Vim tias lub tuam txhab Rose Red Rose ntev ntev hauv Saint John, N.B., yog kaw nws lub qhov rooj tom qab ntau xyoo ntawm kev tsim tshuaj yej. "Tshuaj yej tau poob rau hauv kev muaj koob npe thiab yog ib qho laj thawj ntawm qhov chaw tsim tshuaj yej tsob nroj no tau raug kaw,"
Puas yog tus qaib ntxhw liab liab muaj kev puas tsuaj?
Cov ntoo peg liab muaj tau nyob rau hauv cov npe tsiaj txhu txij thaum Lub Kaum Hli 1970-nyob rau hauv txoj cai lij choj uas tau ua dhau los Txoj Cai Endangered Species Act of 1973. Qhov kev hem thawj rau cov noog no yog Kev puas tsuaj nyob.
Cov roj teeb uas ntws tawm puas muaj txiaj ntsig lossis muaj teeb meem?
Thaum cov roj teeb tsis raug pov tseg ntawm lub casing tuaj yeem tawg tau thiab cov tshuaj lom neeg nyob hauv tuaj yeem nkag mus rau ib puag ncig ib puag ncig. Cov khoom xau tuaj yeem ua paug rau hauv av thiab dej thiab qee qhov ntawm cov khoom tuaj yeem sib sau hauv cov tsiaj qus thiab tib neeg.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
