München 2004 – scientific programme

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MO: Molekülphysik

MO 12: Poster I

MO 12.14: Poster

Tuesday, March 23, 2004, 14:00–16:00, Schellingstr. 3

FS-Study on Carotenoid to Bacteriochlorophyll Energy-Transfer in Light-Harvesting1 Complexes from Rhodospirillum rubrum with Carotenoids of Different Conjugation Lengths — •Peter Gaertner¹, Helmut Port¹, Markus Branschaedel² und Robin ghosh² — ¹3. Physikalisches Institut — ²Department of Bioenergetics, Institute of Biology, Uni Stuttgart

This contribution comprises a comparative fs-spectroscopic study on light-harvesting complexes 1 (LH1) from mutants of Rhodospirillum rubrum (R.r.). These complexes contain carotenoids (Car) of different conjugation lengths (n=13 or n=11, resp.), but no reaction center. After selective excitation of different electronic states of the pigments and comparison with the LH1 of a carotenoid-less mutant, we are able to draw conclusions about Car to Bacteriochlorophyll (BChl) energy-transfer.