Electric field effects on red chlorophylls, beta-carotenes and P700 in cyanobacterial Photosystem I complexes.

@article{Frese2002ElectricFE,
  title={Electric field effects on red chlorophylls, beta-carotenes and P700 in cyanobacterial Photosystem I complexes.},
  author={Raoul N Frese and Miguel Aljaro Palacios and A Azzizi and Ivo H M van Stokkum and Jochen Kruip and Matthias R{\"o}gner and Navassard V. Karapetyan and Eberhard Schlodder and Rienk van Grondelle and Jan P. Dekker},
  journal={Biochimica et biophysica acta},
  year={2002},
  volume={1554 3},
  pages={
          180-91
        }
}
We have probed the absorption changes due to an externally applied electric field (Stark effect) of Photosystem I (PSI) core complexes from the cyanobacteria Synechocystis sp. PCC 6803, Synechococcus elongatus and Spirulina platensis. The results reveal that the so-called C719 chlorophylls in S. elongatus and S. platensis are characterized by very large polarizability differences between the ground and electronically excited states (with Tr(Deltaalpha) values up to about 1000 A(3) f(-2)) and by… CONTINUE READING

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