Cov txheej txheem:
Video: Dab tsi yog prions 11?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Prions yog cov kab mob sib kis tau ua rau muaj ntau yam kab mob neurodegenerative hauv cov tsiaj, xws li, Creutzfeldt Jakob kab mob. Qhov no tshwm sim vim qhov txawv txav ntawm cov proteins hauv lub hlwb. Lawv tuaj yeem zom cov nucleic acids tab sis tau txais cov tshuaj uas tsis muaj cov protein.
Ntxiv mus, dab tsi yog cov piv txwv ntawm prions?
Hom kab mob prion muaj xws li:
- CJD. Ib tug neeg tuaj yeem tau txais tus mob no, uas yog hu ua tsev neeg CJD.
- Variant CJD.
- Variably protease-sensitive prionopathy (VSPr).
- Gerstmann-Sträussler-Scheinker kab mob (GSS).
- Kuru.
- Kev tuag insomnia (FI).
Dab tsi yog prions paub ua rau? Prion kab mob yog ua los ntawm cov ntaub ntawv tsis raug ntawm prion protein, ib paub uas PrP. Tib neeg forms of prion Cov kab mob feem ntau yog cov npe Creutzfeldt-Jakob kab mob (CJD), kev tuag hauv tsev neeg insomnia (FFI), Gertsmann-Straussler-Scheinker syndrome (GSS), kuru thiab variably protease-sensitive prionopathy (VPSPr).
Dhau li, dab tsi yog prion ib txwm?
Paub daws teeb. PrPc yog a li qub cell-surface glycoprotein uas yog conformationally characterized los ntawm ob alpha helices thiab ob complex-hom N-txuas oligosaccharide chains. Cov protein no yog qhov tshwj xeeb hauv nws qhov kev nyiam ua rau yuam kev mus rau hauv cov kab mob neurodegenerative ua rau muaj protein ntau sib kis kab mob, hu ua a prion.
Puas yog prion yog kab mob lossis kab mob?
' Prion ' yog ib lo lus thawj zaug siv los piav qhia txog tus kab mob sib kis tsis zoo uas lub luag haujlwm rau ntau yam kab mob neurodegenerative pom hauv cov tsiaj, suav nrog tus kab mob Creutzfeldt-Jakob (CJD) hauv tib neeg. (Tag nrho cov kab mob uas twb paub lawm, xws li kab mob thiab kab mob , muaj cov nucleic acids, uas ua rau lawv rov tsim dua.)
Pom zoo:
Dab tsi yog glycoprotein dab tsi yog ib qho ntawm kev siv glycoproteins?
Glycoproteins yog cov protein uas muaj cov oligosaccharide saw (glycans) covalently txuas nrog cov amino acid sab-saw. Glycoproteins kuj tseem yog ib qho tseem ceeb ua ke ntawm cov protein, uas lawv ua lub luag haujlwm hauv kev sib cuam tshuam ntawm tes -cell
Dab tsi yog cov khoom siv hauv lub cev zom zaub mov thiab lawv lub luag haujlwm yog dab tsi?
Cov khoom siv hauv lub cev zom zaub mov suav nrog cov hniav, tus nplaig, cov qog ua kua qaub, daim siab, lub zais zis, thiab txiav txiav. Txhawm rau ua tiav lub hom phiaj ntawm kev muab lub zog thiab khoom noj khoom haus rau lub cev, rau lub luag haujlwm tseem ceeb nyob hauv cov txheej txheem zom zaub mov: nqos. Kev zais
Dab tsi yog qhov sib txawv loj ntawm prions thiab kab mob virus quizlet?
Tsis zoo li tus kab mob, prion yog ib qho molecule nkaus xwb. Tsis zoo li cov kab mob, prions yog cov kab mob sib kis. -Tsis zoo li cov kab mob, prions tsis suav nrog cov nucleic acids
Dab tsi yog prions tsim los ntawm?
Cov protein uas prions yog tsim los ntawm (PrP) muaj nyob thoob plaws lub cev, txawm nyob rau hauv cov neeg noj qab haus huv thiab tsiaj txhu. Txawm li cas los xij, PrP pom nyob rau hauv cov khoom sib kis muaj cov qauv sib txawv thiab tiv taus cov proteases, cov enzymes hauv lub cev uas tuaj yeem ua rau cov protein ntau
Dab tsi ua rau prions txawv ntawm lwm tus neeg kis kab mob?
Tshwj xeeb, tus neeg sawv cev tiv taus hluav taws xob ultraviolet, uas ib txwm ua rau cov kab mob tsis zoo los ntawm kev rhuav tshem lawv cov nucleic acid. Prions tsis zoo li tag nrho lwm cov kab mob uas ua rau muaj kab mob hauv qhov uas lawv pom tias tsis muaj nucleic acid - piv txwv li, DNA lossis RNA - uas yog cov khoom siv caj ces uas tag nrho lwm cov kab mob muaj