Carotenoids in Energy Transfer and Quenching Processes in Pcb and Pcb-PS I Complexes from Prochlorothrix hollandica

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F10%3A00011884" target="_blank" >RIV/60076658:12310/10:00011884 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60076658:12640/10:00012191 RIV/60077344:_____/10:00345900

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Carotenoids in Energy Transfer and Quenching Processes in Pcb and Pcb-PS I Complexes from Prochlorothrix hollandica

Popis výsledku v původním jazyce

Chlorophyll (Chl) a/b-binding proteins from Prochlorothrix hollandica known as Pcb antennae were studied by femtosecond transient absorption technique to identify energy transfer rates and pathways in Pcb and Pcb PS I complexes. Carotenoids transfer energy to Chl with low efficiency of similar to 25% in Pcb complexes. Interestingly, analysis of transient absorption spectra identified a pathway from the hot S-1 state of zeaxanthin and/or beta-carotene as the major energy transfer channel between carotenoids and chlorophylls in Pcb whereas the S-2 state contributes only marginally to energy transfer. Due to energetic reasons, no energy transfer is possible via the relaxed S-1 state of carotenoids. The low overall energy transfer efficiency of carotenoidsrecognizes chlorophylls as the main light-harvesting pigments. Besides Chl a, presence of Chl h, which transfers energy to Chl a with nearly 100% efficiency, significantly broadens the spectral range accessible for light-harvesting and i

Název v anglickém jazyce

Carotenoids in Energy Transfer and Quenching Processes in Pcb and Pcb-PS I Complexes from Prochlorothrix hollandica

Popis výsledku anglicky

Chlorophyll (Chl) a/b-binding proteins from Prochlorothrix hollandica known as Pcb antennae were studied by femtosecond transient absorption technique to identify energy transfer rates and pathways in Pcb and Pcb PS I complexes. Carotenoids transfer energy to Chl with low efficiency of similar to 25% in Pcb complexes. Interestingly, analysis of transient absorption spectra identified a pathway from the hot S-1 state of zeaxanthin and/or beta-carotene as the major energy transfer channel between carotenoids and chlorophylls in Pcb whereas the S-2 state contributes only marginally to energy transfer. Due to energetic reasons, no energy transfer is possible via the relaxed S-1 state of carotenoids. The low overall energy transfer efficiency of carotenoidsrecognizes chlorophylls as the main light-harvesting pigments. Besides Chl a, presence of Chl h, which transfers energy to Chl a with nearly 100% efficiency, significantly broadens the spectral range accessible for light-harvesting and i

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CE - Biochemie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physical Chemistry B

ISSN

1520-6106

e-ISSN

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Svazek periodika

114

Číslo periodika v rámci svazku

28

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

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Kód UT WoS článku

000279787400022

EID výsledku v databázi Scopus

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