title: Direct Observation of Energy Detrapping in LH1-RC Complex by Two-Dimensional Electronic Spectroscopy.
abstract: The purple bacterial core light harvesting antenna-reaction center (LH1-RC) complex is the simplest system able to achieve the entire primary function of photosynthesis. During the past decade, a variety of photosynthetic proteins were studied by a powerful technique, two-dimensional electronic spectroscopy (2DES). However, little attention has been paid to LH1-RC, although its reversible uphill energy transfer, trapping, and backward detrapping processes, represent a crucial step in the early photosynthetic reaction dynamics. Thus, in this work, we employed 2DES to study two LH1-RC complexes of Thermochromatium (Tch.) tepidum. By direct observation of detrapping, the complex reversible process was clearly identified and an overall scheme of the excitation evolution in LH1-RC was obtained.
authors.affiliation: Department of Biophysics, Faculty of Sciences, VU University Amsterdam , De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
authors.forename: Fei
authors.identifier: 0000-0002-7607-6429
authors.initials: F
authors.lastname: Ma
authors.affiliation: Faculty of Science, Ibaraki University , Mito, Ibaraki 310-8512, Japan.|Research Institute for Interdisciplinary, Okayama University , Tsushima Naka 3-1-1, Okayama 700-8530, Japan.
authors.forename: Long-Jiang
authors.initials: LJ
authors.lastname: Yu
authors.affiliation: Department of Biophysics, Faculty of Sciences, VU University Amsterdam , De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
authors.forename: Ruud
authors.initials: R
authors.lastname: Hendrikx
authors.affiliation: Faculty of Science, Ibaraki University , Mito, Ibaraki 310-8512, Japan.
authors.forename: Zheng-Yu
authors.initials: ZY
authors.lastname: Wang-Otomo
authors.affiliation: Department of Biophysics, Faculty of Sciences, VU University Amsterdam , De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands.
authors.forename: Rienk
authors.initials: R
authors.lastname: van Grondelle