2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Peptide daim ntawv cog lus; uncharged tRNA txav mus rau qhov E site & tom qab tawm ntawm ribosome; lub mRNA tau hloov pauv 3 lub hauv paus mus rau sab laug, ua rau tRNA bearing dipeptide hloov mus rau P site P site P-site (rau peptidyl) yog qhov thib ob khi qhov chaw rau tRNA hauv ribosome. Lwm ob qhov chaw yog A-site (aminoacyl), uas yog thawj qhov chaw khi hauv ribosome, thiab E-site (tawm), qhov thib peb. Thaum lub sij hawm txhais lus protein, P-site tuav lub tRNA uas txuas nrog cov saw hlau loj hlob. https://en.wikipedia.org › wiki › P-site
P-site - Wikipedia
. 3. Thawj kauj ruam ntawm elongation tiav, yooj yim los ntawm EF-G.
Qhov chaw twg ntawm ribosome tuav ib qho tRNA uas tsis tau them?
Cov saw hlau loj hlob polypeptide raug xa mus rau qhov kawg ntawm cov amino acid uas tuaj, thiab A-site tRNA tuav ib ntus tuav cov saw hlau loj hlob, thaum P-site tRNA Tam sim no khoob lossis tsis tau them.
Dab tsi ua rau ejection ntawm uncharged tRNA los ntawm E site ntawm ribosome thaum lub sij hawm txhais lus?
Aminoacyl-tRNA Binding (Cov Nqi Zog=1 GTP) Aminoacyl-tRNA tsis tuaj yeem khi kom txog thaum muaj kev sib khi ua ke nrog cov khoom elongation EF-Tu thiab GTP (guanosine triphosphate). Kev khi ntawm qhov nyuaj no ua rau ejection ntawm deacylated tRNA los ntawm E site.
Yuav ua li cas tRNAs txuas rau qhov tseeb amino acid?
Yuav ua li cas cov aminoacid ua txuas rau tRNA? Lub zog ntawm ATP hydrolysis yog siv txhawm rau txuas txhua cov amino acid rau nws cov tRNA molecule hauv kev sib txuas ntawm lub zog siab.
4 kauj ruam ntawm kev txhais lus yog dab tsi?
Kev txhais lus tshwm sim nyob rau plaub theem: ua kom (npaj txhij), pib (pib), elongation (ua kom ntev) thiab txiav (nres). Cov ntsiab lus no piav qhia txog kev loj hlob ntawm cov amino acid saw (polypeptide). Amino acids raug coj mus rau ribosomes thiab sib sau ua ke rau hauv cov protein.
Pom zoo:
Hnub nyoog cuam tshuam li cas ntawm kev hais lus thiab kev txav mus los?
Thaum peb muaj hnub nyoog, hloov pauv ib txwm tshwm sim uas tuaj yeem cuam tshuam rau peb cov lus hais, hnov lus thiab nco. Lub suab chords tuaj yeem ua rau qis dua thiab cov leeg pob txha tuaj yeem ua rau tsis muaj zog, ua rau nws nyuaj rau kev sib txuas lus.
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Lub sijhawm nyob qhov twg ntawm lub sijhawm teem sijhawm?
kab kab rov tav ntawm lub rooj ntu ntu yog hu ua ntu ntu. Lub sijhawm nyob rau ntawm lub sijhawm nyob qhov twg? Ib lub sijhawm yog kab kab rov tav ntawm lub rooj ntu ntu. Muaj xya lub sij hawm nyob rau hauv lub sij hawm ntawm lub sij hawm, nrog txhua tus pib ntawm sab laug.
Lub zog hloov pauv ntawm tiam mus rau kev xa mus rau kev faib tawm li cas?
Power, tshwj xeeb tshaj yog qib voltage, xa los ntawm cov kab xa tawm raug txo, lossis "tso nqis," los ntawm kev hloov pauv thiab xa mus los ntawm cov kab xa tawm, uas txuas nrog tom tsev thiab kev lag luam. … Nws yog ceg kawg ntawm kev xa hluav taws xob los ntawm ib tiam mus rau cov neeg siv khoom.
Lub sijhawm saw elongation peptide daim ntawv cog lus yog tsim?
Thaum lub sijhawm txhais lus, elongation ntawm polypeptide tshwm sim los ntawm kev sib ntxiv ntawm cov amino acids sib txawv. Tsim ntawm thawj thiab tom qab peptide daim ntawv cog lus tshwm sim ntawm dawb-COOH pawg ntawm peptidyl tRNA ntawm P site thiab dawb NH2 pawg aminoacyl tRNA ntawm ib qhov chaw nrog kev pab ntawm peptidyl transferase enzyme.
