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

R.N. Frese, M.A. Palacios, A. Azzizi, I.H.M. van Stokkum, J. Kruip, M. Rögner, N.V. Karapetyan, E. Schlodder, R. van Grondelle, J.P. Dekker

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

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(Δα) values up to about 1000 Å
Original languageEnglish
Pages (from-to)180-191
JournalBiochimica et Biophysica Acta (BBA) - Bioenergetics
Volume1554
DOIs
Publication statusPublished - 2002

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