title: Polarization single complex imaging of circular photosynthetic antenna.
abstract: Single complex fluorescence polarization spectroscopy is applied to study the peripheral light harvesting antenna (LH2) from photosynthetic purple bacterium Rhodopseudomonas (Rps.) acidophila. The measured two-dimensional excitation-emission polarization plots are used to construct geometric representation for the absorbing B800 and emitting B850 as ellipses. The shape and orientation of the ellipses is discussed in terms of tilted LH2 complexes where emission occurs from energetically disordered B850 excitons.
authors.affiliation: Department of Chemical Physics, Lund University, Lund, Sweden. sumera.tubasum@chemphys.lu.se
authors.forename: Sumera
authors.initials: S
authors.lastname: Tubasum
authors.forename: Daniel
authors.initials: D
authors.lastname: Thomsson
authors.forename: Richard
authors.initials: R
authors.lastname: Cogdell
authors.forename: Ivan
authors.initials: I
authors.lastname: Scheblykin
authors.forename: Tõnu
authors.initials: T
authors.lastname: Pullerits
mesh_terms: D001426:Bacterial Proteins / Q000737:chemistry* / Q000302:isolation & purification; D016231:Fluorescence Polarization Immunoassay; D045342:Light-Harvesting Protein Complexes / Q000737:chemistry* / Q000302:isolation & purification; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry*; D012241:Rhodopseudomonas / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods
chemical_list: C081521:B800-850 light-harvesting complex, bacteria; D001426:Bacterial Proteins; D045342:Light-Harvesting Protein Complexes; D045322:Photosynthetic Reaction Center Complex Proteins