Stark fluorescence spectroscopy reveals two emitting sites in the dissipative state of FCP antennas.

Stark fluorescence spectroscopy reveals two emitting sites in the dissipative state of FCP antennas.
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Stark 荧光光谱揭示了 FCP 天线耗散状态下的两个发射位点。

DOI:
10.1016/j.bbabio.2013.09.001
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发表时间:
2014
期刊:
Biochimica et biophysica acta
影响因子:
--
通讯作者:
R. Berera
R. Berera
中科院分区:
--
文献类型:
--
作者:
M. Wahadoszamen;A. Ghazaryan;H. E. Cingil;Anjue Mane Ara;C. Büchel;R. van Grondelle;R. Berera

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硅藻的特征在于非常有效的光保护机制,其中多余的能量在由岩藻黄质-叶绿素(Chl)蛋白复合物(FCPs)构成的主天线系统中以热的形式耗散。我们在FCPs的光捕获和能量耗散状态下进行了Stark荧光光谱。我们的研究结果表明,两个不同的发射带时,在FCPa和可能在FCPb的能量耗散诱导创建。更具体地说,一个谱带的特征在于高于700 nm的宽红移发射,并且与我们在植物的主要捕光复合物II(LHCII)的耗散状态中检测到的红移谱带具有很强的相似性[26]。我们讨论的结果在光的不同机制提出负责光合光保护。
Diatoms are characterized by very efficient photoprotective mechanisms where the excess energy is dissipated as heat in the main antenna system constituted by fucoxanthin–chlorophyll (Chl) protein complexes (FCPs). We performed Stark fluorescence spectroscopy on FCPs in their light-harvesting and energy dissipating states. Our results show that two distinct emitting bands are created upon induction of energy dissipation in FCPa and possibly in FCPb. More specifically one band is characterized by broad red shifted emission above 700 nm and bears strong similarity with a red shifted band that we detected in the dissipative state of the major light-harvesting complex II (LHCII) of plants [26]. We discuss the results in the light of different mechanisms proposed to be responsible for photosynthetic photoprotection.
基于斯塔克光谱和分子轨道理论,研究了溶液中岩藻黄质和叶绿素-a/c2 蛋白 (FCP) 中岩藻黄质 S2 态的电荷转移特性。
DOI: 10.1021/jp802689p
发表时间: 2008-09-18
期刊: The journal of physical chemistry. B
影响因子: --
作者:
Premvardhan L;Sandberg DJ;Fey H;Birge RR;Büchel C;van Grondelle R
通讯作者: van Grondelle R