Regensburg 2010 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 29: Biomolecular Spectroscopy
BP 29.7: Vortrag
Donnerstag, 25. März 2010, 16:15–16:30, H45
Excitation energy transfer in the Phycobiliprotein Antenna of the cyanobacterium Acaryochloris marina investigated by transient fs absorption spectroscopy. — •Collins Nganou1, Moritz Grehn1, Christoph Theiss1, Marco Vitali2, Franz- Joseph Schmitt1, Hans Joachim Eichler1, and Hann-Jörg Eckert2 — 1Institute of Optics, Technical University Berlin, Straße des 17. Juni 135, Berlin-Germany — 2Max-Volmer-Laboratory for Biophysical Chemistry, Technical University Berlin, Straße des 17. Juni 135, Berlin-Germany
The investigation of excitation energy transfer (EET) in the antenna system of Acaryochloris marina containing both chlorophyll (Chl) d and phycobiliprotein (PBP) as light harvesting pigments continue to be a case of debate in the scientific community. The PBP-antenna is a rod-shaped antenna of three homo-hexamers containing phycocyanin (PC) and one hetero-hexamer of PC and allophycocyanine (APC). In the present work we discuss the EET in isolated PBP-antennae by transient fs absorption spectroscopy measurements and show that the presence of phosphate in the buffering medium is an important requirement to preserve the EET between the PBP pigments.