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Fluctuations in the Electron–Phonon Coupling of a Single Chromoprotein


  • R.K. and J.K. gratefully acknowledge financial support from the Deutsche Forschungsgemeinschaft (KO 1359/16-1, GZ: 436 EST 113/4/0-1 and GRK1640) and the State of Bavaria within the initiative “Solar Technologies go Hybrid”. K.T. and A.F. have been partially supported by the Estonian Research Council (IUT02-28). R.J.C. thanks the BBSRC for financial support. We thank Prof. M. van Heel (Imperial College London, UK) for providing us with the MSA algorithm.


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Sequences of high resolution low-temperature emission spectra from individual light-harvesting 2 (LH2) complexes from Rhodopseudomonas acidophila reveal a much larger variety of the emission profiles than previously observed. The results provide direct evidence for substantial variations in electron–phonon coupling and concomitantly of exciton (de)localization within single pigment-protein complexes.