Stuttgart 2012 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 14: Poster 2: Biomolecules, Electronic Spectroscopy, Experimental Techniques, Quantum Chemistry, Various Topics
MO 14.1: Poster
Mittwoch, 14. März 2012, 16:30–19:00, Poster.IV
Intensity Fluctuations of the Fluorescence of Individual Pigment-Protein Complexes from Rhodopseudomonas acidophila. — •Sebastian R. Beyer1, Mario Schörner1, Alexander Löhner1, June Southall2, Richard J. Cogdell2, and Jürgen Köhler1 — 1Experimental Physics IV, University of Bayreuth, 95440 Bayreuth, Germany — 2Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, Biomedical Research Building, Glasgow G12 8QQ, Scotland, UK
The photosynthetic apparatus of purple bacteria is a highly efficient system to convert solar radiation into biological usable forms of energy. Part of this photosynthetic apparatus are the so called pigment-protein complexes. These membrane proteins are responsible for the initial step in the photosynthesis of purple bacteria – the absorption of sunlight.
We present a study on the temporal evolution of fluorescence emission from single pigment-protein complexes. Light harvesting complexes from purple bacteria were investigated under controlled environmental conditions with respect to their fluorescence intensity as well as their spectral properties as a function of time.