Single Molecule Spectroscopy on Photosynthetic Pigment-Protein Complexes
Optics and Spectroscopy (English translation of Optika i Spektroskopiya), ISSN: 0030-400X, Vol: 91, Issue: 3, Page: 457-460
2001
- 3Citations
- 5Captures
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Conference Paper Description
Single molecule spectroscopy was applied to unravel the energy transfer pathway in photosynthetic pigment-protein complexes. Detailed analysis of excitation and fluorescence emission spectra has been made for peripheral plant antenna LHC II and Photosystem I from cyanobacterium Synechococcus elongatus. Optical transitions of individual pigments were resolved under nonselective excitation of antenna chlorophylls. High-resolution fluorescence spectroscopy of individual plant antenna LHC II indicates that at low temperatures, the excitation energy is localized on the red-most Chl a pool absorbing at 680 nm. More than one pigment molecule is responsible for the fluorescence emission of the LHC II trimer. The spectral lines of single Chl a molecules absorbing at 675 nm are broadened because of the Foerster energy transfer towards the red-most pigments. Low-temperature spectroscopy on single PS I trimers indicates that two subgroups of pigments, which are present in the red antenna pool, differ by the strength of the coupling with the protein environment and by the efficiency of the triplet state quenching. Based on single molecule and hole burning data, we envisage the dimeric nature of the strongly phonon coupled red-most Chl state. © 2001 MAIK "Nauka/lnterperiodica".
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0141786657&origin=inward; http://dx.doi.org/10.1134/1.1405228; http://link.springer.com/10.1134/1.1405228; http://link.springer.com/content/pdf/10.1134/1.1405228; http://link.springer.com/content/pdf/10.1134/1.1405228.pdf; http://link.springer.com/article/10.1134/1.1405228/fulltext.html; https://dx.doi.org/10.1134/1.1405228; https://link.springer.com/article/10.1134/1.1405228
Pleiades Publishing Ltd
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