2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Nyob rau hauv cov xwm txheej anaerobic, pyruvate Ua rau fermentation rau oxidize NADH rau NAD +, yog li glycolysis tuaj yeem txuas ntxiv mus. Cov pyruvate ua yog decarboxylated rau ib qho acetaldehyde . Qhov no acetaldehyde tom qab ntawv dhau qhov tshuaj tiv thaiv catalyzed los ntawm cawv dehydrogenase los tsim ethanol ; qhov no yog qib uas NAD+ tau rov qab los.
Ntawm no, pyruvate decarboxylase ua dab tsi?
Pyruvate decarboxylase yog homotetrameric enzyme (EC 4.1. 1.1) uas catalyses decarboxylation ntawm pyruvic acid rau acetaldehyde thiab carbon dioxide hauv cytoplasm ntawm prokaryotes, thiab hauv cytoplasm thiab cov mitochondria ntawm eukaryotes.
Ib qho ntxiv, puas yog pyruvate dehydrogenase zoo ib yam li pyruvate decarboxylase? Pyruvate decarboxylase yog homotetrameric enzyme (EC 4.1. Cov enzyme no yuav tsum tsis txhob yuam kev rau cov enzyme tsis txheeb ze) pyruvate dehydrogenase , oxidoreductase (EC 1.2. 4.1), uas catalyzes cov oxidative decarboxylation ntawm pyruvate ua rau acetyl-CoA.
Kuj nug, dab tsi tshwm sim thaum lub sij hawm pyruvate decarboxylation?
Pyruvate decarboxylation los yog pyruvate ua oxidation, tseem hu ua txuas cov tshuaj tiv thaiv, yog kev hloov pauv ntawm pyruvate acetyl-CoA los ntawm cov enzyme complex pyruvate dehydrogenase complex. Lub zog tsim hluav taws xob ions thiab cov lwg me me xws li cov amino acids thiab carbohydrates nkag mus rau hauv Krebs cycle li acetyl coenzyme A thiab oxidize hauv lub voj voog.
Puas yog tib neeg muaj pyruvate decarboxylase?
Nws tau tsim los ntawm kwv yees li 96 subunits tau teeb tsa rau hauv peb lub enzymes ua haujlwm hauv tib neeg : 20-30 daim pyruvate dehydrogenase E1 tivthaiv, 60 daim ntawv luam ntawm pyruvate ua dehydrogenase E2 tivthaiv, thiab 6 daim ntawv luam ntawm dihydrolipoyl dehydrogenase (E3).
Pom zoo:
Vim li cas cov pob kws txhuv thiab dej hloov mus ua khoom?
Cov pob kws pob kws thiab dej sib tov ua zoo li sib xyaw qee zaum thiab kua hauv lwm lub sijhawm. Qhov kev sib koom tes no yog ib qho piv txwv ntawm kev ncua (sib xyaw ntawm ob qho xwm txheej), ib qho uas tau muab faib ua ntu thiab sib faib hauv lwm qhov. Thaum koj npuaj cov pob kws nplej nrawm, koj yuam kom cov hmoov txhuv nplej siab ntev ua ke ze dua
Dab tsi ua rau lub hauv paus tawg tawg hloov mus rau tom qab ovulation?
Tom qab ovulation lub hauv paus tawg tau tawg vim qhov poob ntawm nws cov kua hauv qab thiab sai dhau los hloov pauv mus rau hauv cov mos, zoo-vascularized cov qog ua haujlwm lub npe hu ua corpus luteum ("lub cev daj"). Yog hais tias fertilization tsis tshwm sim, ces lub neej ntawm lub corpus luteum yog txwv rau 14 hnub
Qhov kev hloov pauv twg yuav ua rau hloov mus rau sab laug hauv cov pa oxygen hemoglobin khi nkhaus?
Cov pa -hemoglobin kev sib cais sib cais tuaj yeem txav chaw xws li qhov kev sib raug zoo rau cov pa oxygen tau hloov pauv. Cov yam ntxwv uas hloov qhov nkhaus muaj xws li kev hloov pauv hauv cov pa roj carbon dioxide concentration, ntshav kub, ntshav pH, thiab cov concentration ntawm 2,3-diphosphoglycerate (2,3-DPG)
Vim li cas cov hlwb hloov pauv hloov lawv cov duab?
Cov hlwb no hu ua kev hloov pauv vim lawv tuaj yeem hloov pauv hauv lawv cov duab thiab cov qauv. Tsis tas li ntawd, cov hlwb yog stratified, uas txhais tau hais tias lawv tsim ob peb txheej. Cov stratified cells ntawm kev hloov pauv epithelium muab kev tiv thaiv thiab tso cai rau cov hlab ntsha nthuav dav kom haum rau cov kua
Vim li cas kuv thiaj hloov mus rau ib sab thaum kuv zaum?
Kev tsis sib xws hauv kev txav mus los tuaj yeem ua rau koj lub cev yuav tsum tau hloov pauv vim nws zoo li chav nyob kom nkag mus rau hauv qab ntawm lub rooj zaum zaum. Lawm, koj lub cev yuav txav deb ntawm nws sab nruj dua thiab mus rau nws yooj yim dua. Hauv qhov chaw hauv qab ntawm zaum, koj lub duav tig rov zoo li cov leeg uas tuaj yeem ua teeb meem