title: Mapping energy transfer channels in fucoxanthin-chlorophyll protein complex.
abstract: Fucoxanthin-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.
authors.affiliation: Department of Theoretical Physics, Faculty of Physics, Vilnius University, Sauletekio 9-III, 10222 Vilnius, Lithuania; Center for Physical Sciences and Technology, Savanoriu 231, 02300 Vilnius, Lithuania.
authors.forename: Andrius
authors.initials: A
authors.lastname: Gelzinis
authors.affiliation: Department of Theoretical Physics, Faculty of Physics, Vilnius University, Sauletekio 9-III, 10222 Vilnius, Lithuania; Center for Physical Sciences and Technology, Savanoriu 231, 02300 Vilnius, Lithuania.
authors.forename: Vytautas
authors.initials: V
authors.lastname: Butkus
authors.affiliation: Center for Physical Sciences and Technology, Savanoriu 231, 02300 Vilnius, Lithuania.
authors.forename: Egidijus
authors.initials: E
authors.lastname: Songaila
authors.affiliation: Center for Physical Sciences and Technology, Savanoriu 231, 02300 Vilnius, Lithuania.
authors.forename: Ramūnas
authors.initials: R
authors.lastname: Augulis
authors.affiliation: CEA, Institute of Biology and Technology of Saclay, UMR 8221 CNRS, 91191 Gif-sur-Yvette, France.
authors.forename: Andrew
authors.initials: A
authors.lastname: Gall
authors.affiliation: Institut für Molekulare Biowissenschaften, Universität Frankfurt, Max-von-Laue-Straβe 9, Frankfurt, Germany.
authors.forename: Claudia
authors.initials: C
authors.lastname: Büchel
authors.affiliation: CEA, Institute of Biology and Technology of Saclay, UMR 8221 CNRS, 91191 Gif-sur-Yvette, France.
authors.forename: Bruno
authors.initials: B
authors.lastname: Robert
authors.affiliation: Department of Theoretical Physics, Faculty of Physics, Vilnius University, Sauletekio 9-III, 10222 Vilnius, Lithuania.
authors.forename: Darius
authors.initials: D
authors.lastname: Abramavicius
authors.affiliation: Department of Chemical Physics, Lund University, P.O. Box 124, 22100 Lund, Sweden.
authors.forename: Donatas
authors.initials: D
authors.lastname: Zigmantas
authors.affiliation: Department of Theoretical Physics, Faculty of Physics, Vilnius University, Sauletekio 9-III, 10222 Vilnius, Lithuania; Center for Physical Sciences and Technology, Savanoriu 231, 02300 Vilnius, Lithuania. Electronic address: leonas.valkunas@ff.vu.lt.
authors.forename: Leonas
authors.initials: L
authors.lastname: Valkunas
mesh_terms: D002734:Chlorophyll / Q000737:chemistry*; D017377:Diatoms / Q000378:metabolism*; D004735:Energy Transfer; D013057:Spectrum Analysis; D024341:Xanthophylls / Q000737:chemistry*
chemical_list: D024341:Xanthophylls; C025164:fucoxanthin; D002734:Chlorophyll
keywords: Diatoms; Light-harvesting; Two-dimensional spectroscopy