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Mapping energy transfer channels in fucoxanthin-chlorophyll protein complex.

By Andrius Gelzinis, Vytautas Butkus, Egidijus Songaila, Ramūnas Augulis, Andrew Gall, Claudia Büchel, Bruno Robert, Darius Abramavicius, Donatas Zigmantas and Leonas Valkunas

Abstract

International audienceFucoxanthin-chlorophyll protein (FCP) is the key molecular complex performing the light-harvesting function in diatoms, which, being a major group of algae, are responsible for up to one quarter of the total primary production on Earth. These photosynthetic organisms contain an unusually large amount of the carotenoid fucoxanthin, which absorbs the light in the blue-green spectral region and transfers the captured excitation energy to the FCP-bound chlorophylls. Due to the large number of fucoxanthins, the excitation energy transfer cascades in these complexes are particularly tangled. In this work we present the two-color two-dimensional electronic spectroscopy experiments on FCP. Analysis of the data using the modified decay associated spectra permits a detailed mapping of the excitation frequency dependent energy transfer flow with a femtosecond time resolution

Topics: Two-dimensional spectroscopy, Diatoms, Light-harvesting, [SDV]Life Sciences [q-bio]
Publisher: 'Elsevier BV'
Year: 2015
DOI identifier: 10.1016/j.bbabio.2014.11.004
OAI identifier: oai:HAL:hal-01449619v1
Provided by: HAL-CEA
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