Qhov sib txawv tseem ceeb ntawm Ubiquinones thiab Cytochromes yog tias Ubiquinones (CoQ) tsis yog cov proteins thaum Cytochromes yog cov proteins.
Electron thauj saw yog theem kawg ntawm kev ua pa aerobic. Yog li ntawd, nws tshwm sim nyob rau hauv lub puab membrane ntawm mitochondria. Ntxiv mus, nws muaj cov khoom siv hluav taws xob uas pab txhawb kev tsim cov proton gradient thoob plaws hauv daim nyias nyias. Lwm yam tshaj li NAD thiab flavoproteins, Ubiquinones thiab Cytochromes yog ob hom electron cab kuj koom nrog hauv electron thauj saw. Ubiquinones yog non-protein lipid soluble, hydrophobic organic molecules whereas cytochromes yog cov proteins uas muaj hlau.
Ubiquinones yog dab tsi?
Ubiquinones (Coenzyme Q) yog cov lipid-soluble organic molecules me me uas pom nyob rau hauv mitochondrial daim nyias nyias. Txawm li cas los xij, lawv tsis yog cov protein molecules, thiab lawv tsis muaj cov pab pawg heme, es tsis txhob lawv ua haujlwm raws li cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob. Ubiquinone txais electrons los ntawm NADH reductase thiab kis mus rau cytochrome rau kev thauj mus los ntxiv.
Daim duab 01: Ubiquinones
Ubiquinones yog lipid soluble thiab hydrophobic. Yog li ntawd, lawv tuaj yeem ua kom ywj pheej hauv daim nyias nyias thiab ua raws li cov khoom siv hluav taws xob zoo. Thaum ubiquinone lees txais ib lub tshuab hluav taws xob, nws dhau los ua semiquinone, thiab thaum txais ob lub electrons nws dhau los ua ubiquinol.
YCytochromes yog dab tsi?
Cytochromes yog cov protein complex uas ua raws li cov khoom siv hluav taws xob hauv cov saw hlau thauj khoom. Yog li ntawd, lawv yog xoob txuam nrog lub puab membrane ntawm mitochondria. Ntxiv mus, lawv yog me me heme proteins. Cytochromes ua haujlwm tseem ceeb heev ntawm cov khoom siv hluav taws xob vim tias lawv pab txhawb nqa cov khoom siv hluav taws xob mus rau qhov kawg electron txais (O 2) kom ua tiav ua pa.
Daim duab 02: Cytochromes
Ntxiv mus, muaj peb lub ntsiab cytochromes uas yog cytochrome reductase, cytochrome c thiab cytochrome oxidase. Cytochrome reductase tau txais electrons los ntawm ubiquinone thiab hloov mus rau cytochrome c. Tom qab ntawd, cytochrome c hloov hluav taws xob mus rau cytochrome oxidase. Thaum kawg, cytochrome oxidase dhau electrons rau O2 (qhov kawg electron txais). Thaum cov hluav taws xob taug kev los ntawm cov khoom siv hluav taws xob, lub proton gradient yuav tsim, thiab nws yuav pab tau rau ATP ntau lawm.
Dab tsi yog qhov zoo sib xws ntawm Ubiquinones thiab Cytochromes?
- Ubiquinones thiab Cytochromes yog cov khoom siv hluav taws xob.
- Ob leeg yog txuam nrog rau hauv daim nyias nyias ntawm mitochondria.
- Lawv tsim nyog rau ATP synthesis.
- Lawv muaj peev xwm lees txais thiab hloov hluav taws xob.
Qhov txawv ntawm Ubiquinones thiab Cytochromes yog dab tsi?
Ubiquinones thiab Cytochromes yog ob lub tshuab hluav taws xob zoo thiab tseem ceeb hauv cov txheej txheem ua pa. Ubiquinones yog lipid soluble, hydrophobic me me organic molecules. Ntawm qhov tod tes, cytochromes yog heme-muaj protein molecules. Qhov no yog qhov sib txawv tseem ceeb ntawm Ubiquinones thiab Cytochromes. Tsis tas li ntawd, ob leeg tuaj yeem lees txais thiab xa cov electrons. Tab sis, ubiquinones txais ib qho hluav taws xob los ntawm NADH-Q reductase thiab xa mus rau cytochrome thaum cytochromes txais electrons los ntawm ubiquinones thiab hloov mus rau oxygen.
Summary – Ubiquinones vs Cytochromes
Ntau hom kev thauj khoom siv hluav taws xob koom nrog cov saw hlau thauj khoom lossis cov txheej txheem oxidative phosphorylation. Ntawm lawv, ubiquinones thiab cytochromes yog ob hom. Lawv yog cov tseem ceeb ntawm cov txheej txheem no. Ubiquinones yog me me lipid soluble, hydrophobic molecules. Cytochromes yog cov proteins uas muaj cov hlau molecules nrog rau lawv. Qhov no yog qhov txawv ntawm ubiquinones thiab cytochromes.
