Qhov sib txawv tseem ceeb ntawm ubiquinone thiab plastoquinone yog tias ubiquinone muaj nyob rau hauv daim nyias nyias ntawm mitochondria thaum plastoquinone muaj nyob rau hauv thylakoids ntawm chloroplast.
Ubiquinone thiab plastoquinone yog ob qho tseem ceeb prenylquinones uas ua haujlwm raws li cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob thauj khoom ntawm oxygenic photosynthesis thiab aerobic respiration, feem. Ob leeg ua lub luag haujlwm tseem ceeb hauv cov nroj tsuag kev loj hlob thiab kev loj hlob, pab hauv cov nroj tsuag metabolism thiab cov txheej txheem biosynthesis.
Ubiquinone yog dab tsi?
Ubiquinone yog ib hom prenylquinone uas ua raws li cov khoom siv hluav taws xob hauv cov txheej txheem ntawm oxidative phosphorylation uas tshwm sim hauv mitochondria. Lwm lub sij hawm rau ubiquinone yog coenzyme Q. Ubiquinone yog ib qho tseem ceeb hauv lub cellular respiration ntawm cov nroj tsuag. Nws kuj tseem pab tiv thaiv cov kab mob lom neeg tawm tsam dawb radicals.
Daim duab 01: Ubiquinone
Cov qauv ntawm ubiquinone muaj lub nplhaib ntawm ubiquinone (los ntawm cov metabolism ntawm cov amino acid phenylalanine) nrog rau cov saw ntev ntawm carbon hu ua polyprenyl. Cov kws tshawb fawb ntseeg hais tias los ntawm kev siv ubiquinone, cov nroj tsuag tsim thiab cog qoob loo tuaj yeem tsim nrog cov khoom tiv thaiv kev ntxhov siab ntau dua thiab muaj cov khoom noj muaj txiaj ntsig ntxiv. Ubiquinone muaj nyob rau hauv daim nyias nyias ntawm mitochondria ntawm cov nroj tsuag cell.
YPlastoquinone yog dab tsi?
Plastoquinone yog ib hom prenylquinone uas ua raws li cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob thauj khoom ntawm lub teeb-nyob ntawm cov tshuaj tiv thaiv ntawm photosynthesis. Plastoquinone A (PQ-A) lossis plastoquinone 09 (PQ-9) yog hom plastoquinone ntau tshaj plaws nyob hauv cov nroj tsuag. Hom no yog 2, 3-dimethyl-1, 4-benzoquinone molecule nrog ib sab saw ntawm cuaj isoprenyl units. Lwm hom plastoquinones tam sim no nyob rau hauv cov nroj tsuag ntawm tes muaj xws li luv sab chains xws li PQ-3 thiab nws cov analogs xws li PQ-B, PQ-C, thiab PQ-D. Lub xeev oxidation ntawm plastoquinone yog plastosemiquinone (tsis ruaj khov) thiab plastoquinol. Plastoquinol yog ib daim ntawv txo, uas ua raws li antioxidant los ntawm kev txo cov pa oxygen reactive.
Daim duab 02: Plastoquinone
Lub luag haujlwm tseem ceeb ntawm plastoquinone yog ua raws li cov khoom siv hluav taws xob hauv lub teeb-nyob ntawm photosynthesis. Nws muaj nyob rau hauv thylakoid membrane ntawm chloroplast. Thaum lub teeb pom kev ntawm photosynthesis, plastoquinone pab txhawb kev hloov ntawm electrons ntawm PS-II mus rau Cytb6f complex.
Dab tsi yog qhov zoo sib xws ntawm Ubiquinone thiab Plastoquinone?
- Ubiquinone thiab plastoquinone yog prenylquinones.
- Lawv muaj nyob rau hauv cov nroj tsuag cell.
- Ntxiv mus, lawv tau koom nrog hauv cov saw hlau thauj hluav taws xob.
- Ob lub molecules yog cov khoom siv hluav taws xob.
- Lawv ob leeg pab txhawb kev loj hlob thiab kev loj hlob ntawm cov nroj tsuag.
Qhov txawv ntawm Ubiquinone thiab Plastoquinone yog dab tsi?
Ubiquinone muaj nyob rau hauv daim nyias nyias ntawm mitochondria, thaum plastoquinone muaj nyob rau ntawm thylakoids ntawm chloroplast. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm ubiquinone thiab plastoquinone. Ntxiv mus, ubiquinone ua raws li cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob thauj khoom ntawm oxidative phosphorylation, thaum plastoquinone ua raws li cov khoom siv hluav taws xob hauv cov hluav taws xob thauj khoom ntawm lub teeb nyob ntawm kev cuam tshuam ntawm photosynthesis. Tsis tas li ntawd, ubiquinone yog lub teeb-dependent, thaum plastoquinone yog lub teeb-yooj yim.
Cov hauv qab no qhia txog qhov sib txawv ntawm ubiquinone thiab plastoquinone hauv daim ntawv teev npe rau kev sib piv ntawm ib sab.
Summary – Ubiquinone vs Plastoquinone
Ubiquinone thiab plastoquinone yog ob qho tseem ceeb prenylquinones uas ua haujlwm raws li cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob thauj khoom ntawm oxygenic photosynthesis thiab aerobic respiration, feem. Ubiquinone muaj nyob rau hauv daim nyias nyias ntawm mitochondria. Plastoquinone muaj nyob rau ntawm thylakoids ntawm chloroplast. Ob leeg yog prenylquinones. Ubiquinone yog ib qho tseem ceeb rau kev ua pa ntawm tes ntawm cov nroj tsuag. Nws kuj pab tiv thaiv cov kab mob lom neeg tawm tsam dawb radicals. Thaum lub teeb pom kev ntawm photosynthesis, plastoquinone pab txhawb kev hloov ntawm electrons ntawm PS-II mus rau Cytb6f complex. Yog li, qhov no qhia txog qhov sib txawv ntawm ubiquinone thiab plastoquinone.
