Qhov sib txawv tseem ceeb ntawm cytochrome thiab phytochrome yog cytochrome yog ib qho hluav taws xob hloov hluav taws xob heme protein koom nrog hauv kev ua pa aerobic. Lub caij no, phytochrome yog photoreceptor protein uas nkag siab rau lub teeb liab thiab deb-liab ntawm qhov pom spectrum.
Cov kab mob nyob muaj ntau hom xim. Qee qhov yog cov xim uas nqus tau lub teeb thaum qee qhov yog cov xim ua pa. Cytochrome yog ib qho metalloprotein uas ua haujlwm raws li cov khoom siv hluav taws xob hauv kev ua pa aerobic. Lub caij no, phytochrome yog photoreceptor uas absorbs liab thiab deb-liab teeb los ntawm pom spectrum. Piv rau cytochrome, phytochromes tseem ceeb hauv ntau yam ntawm kev loj hlob ntawm cov nroj tsuag.
YCytochrome yog dab tsi?
Cytochromes yog cov protein complex uas ua raws li cov khoom siv hluav taws xob hauv cov khoom siv hluav taws xob. Lawv yog xoob txuam nrog lub puab membrane ntawm mitochondria. 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 (O2) txhawm rau ua kom tiav aerobic ua pa.
Daim duab 01: Cytochrome
Muaj peb lub ntsiab cytochromes li cytochrome reductase, cytochrome c, thiab cytochrome oxidase. Cytochrome reductase tau txais electrons los ntawm ubiquinone thiab hloov mus rau cytochrome c. Cytochrome c hloov hluav taws xob rau cytochrome oxidase. Cytochrome oxidase kis electrons rau O2 (qhov kawg electron txais). Thaum cov hluav taws xob taug kev los ntawm cov khoom siv hluav taws xob, ib qho proton gradient yuav raug tsim, thiab nws yuav pab ATP ntau lawm.
YPhytochrome yog dab tsi?
Y Phytochrome yog ib qho photoreceptor pom nyob rau hauv cov nroj tsuag, fungi, thiab kab mob. Nws tau pom los ntawm Sterling Hendricks thiab Harry Borthwick. Phytochromes tuaj yeem ntes lub teeb nyob rau thaj tsam liab thiab deb-liab ntawm qhov pom spectrum. Yog li, phytochrome system ua haujlwm raws li lub teeb liab-rhiab hauv cov nroj tsuag. Thaum nruab hnub, los ntawm absorbing lub teeb liab wavelength, phytochrome r ua phytochrome fr. Thaum hmo ntuj, los ntawm absorbing lub teeb liab deb, phytochrome fr ua photochrome r. Yog li, Pr yog ib daim ntawv uas tsis tshua muaj zog, thaum Pfr yog ib hom kev mob siab ntawm phytochrome. Ntxiv mus, phytochromes ua raws li qhov ntsuas kub. Structurally phytochrome yog ib qho protein molecule (dimer ntawm ob zoo tib yam 124 kDa polypeptides) nrog ib tug chromophore, uas yog covalently bonded rau cov protein.
Daim duab 02: Phytochrome
Phytochromes yog ib qho tseem ceeb rau ntau yam ntawm cov nroj tsuag kev loj hlob, nrog rau cov noob germination, qia elongation, nplooj nthuav, tsim ntawm tej pigments, chloroplast txoj kev loj hlob, thiab flowering. Ntxiv mus, phytochromes cuam tshuam rau hauv paus kev loj hlob. Muaj tsib phytochromes.
Dab tsi yog qhov zoo sib xws ntawm Cytochrome thiab Phytochrome?
- Ob leeg cytochrome thiab phytochrome yog cov proteins.
- Cytochrome yog xim ua pa, thaum phytochrome yog photopigment.
Qhov txawv ntawm Cytochrome thiab Phytochrome yog dab tsi?
Cytochrome yog cov protein heme koom nrog hauv cov saw hlau thauj hluav taws xob ua cov khoom siv hluav taws xob. Lub caij no, photochrom yog ib qho photoreceptor pom nyob rau hauv cov nroj tsuag, kab mob, thiab fungi, uas absorbs liab thiab deb-liab teeb los ntawm lub teeb pom kev. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm cytochrome thiab phytochrome.
Ntxiv mus, cytochromes muaj nyob hauv cov tsiaj, thaum phytochromes tsis nyob hauv cov tsiaj. Yog li, qhov no kuj yog qhov sib txawv ntawm cytochrome thiab phytochrome.
Summary – Cytochrome vs. Phytochrome
Cytochrome yog cov protein heme xav tau rau kev ua pa aerobic. Nws ua haujlwm raws li electron hloov protein. Nyob rau hauv sib piv, phytochrome yog ib tug photoreceptor protein uas yog ib qho tseem ceeb rau ntau yam ntawm cov nroj tsuag kev loj hlob, tshwj xeeb tshaj yog nyob rau hauv photomorphogenic yam. Phytochromes muaj nyob rau hauv cov nroj tsuag, kab mob thiab fungi thaum cytochromes pom nyob rau hauv cov nroj tsuag thiab tsiaj. Yog li, qhov no qhia txog qhov sib txawv ntawm cytochrome thiab phytochrome.
