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  A Comparison of the LH2 Antenna Complex of Three Purple Bacteria by Hole Burning and Absorption Spectroscopes

Wu, H.-M., Reddy, N., Cogdell, R., Münke, C., Michel, H., & Small, G. J. (1996). A Comparison of the LH2 Antenna Complex of Three Purple Bacteria by Hole Burning and Absorption Spectroscopes. Molecular Crystals and Liquid Crystals Science and Technology Section A-Molecular Crystals and Liquid Crystals, 291(1), 163 -173. doi:10.1080/10587259608042744.

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 Creators:
Wu, H.-M.1, Author
Reddy , N.R.S.1, Author
Cogdell, R.J.2, Author
Münke, Cornelia3, Author              
Michel, Hartmut3, Author              
Small, Gerald J.1, Author
Affiliations:
1Ames LaboratoryUSDOE and Department of Chemistry, Iowa State University, Ames, Iowa 50011, ou_persistent22              
2Department of Botany, University of Glasgow, G128QQ, U.K., ou_persistent22              
3Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Max Planck Society, ou_2068290              

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 Abstract: The light harvesting 2 or B800-B850 complexes of Rhodospirullum molishianum, Rhodopseudomonas acidophila (strain 10050) and Rhodobacter sphaeroides are compared on the basis of thermal broadening and shifting of the B800 and B850 absorption bands, the B800→B850 energy transfer time and B870 which is the lowest exciton level of the B850 ring of BChl a dimers. The existence of B870 for Rs. molischianum is established and its B800→B850 energy transfer time, 1.9 ± 0.2 ps at 4.2 K, reported for the first time. The properties of the complexes of Rs. molischianum and Rps. acidophila bear a close resemblance. LH2 of Rb. sphaeroides is distinct, e.g. the thermal shifting of its B850 band is significantly weaker, consistent with weaker excitonic couplings in the B850 ring. For all species, these couplings strengthen upon glass formation near 150 K. Thermal broadening of B850 is interpreted in terms of inter-exciton level relaxation.

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Language(s): eng - English
 Dates: 2006-10-041996
 Publication Status: Published in print
 Pages: 11
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1080/10587259608042744
 Degree: -

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Title: International Meeting on Hole Burning and Related Spectroscopies: Science and Applications (HBRS '96)
Place of Event: Brainerd, Minnesota, USA
Start-/End Date: 1996-09-13

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Funding organization : Iowa State University; Institute for Physical Research and Technology (IPRT), United States

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Title: Molecular Crystals and Liquid Crystals Science and Technology Section A-Molecular Crystals and Liquid Crystals
Source Genre: Journal
 Creator(s):
Small, Gerald J.1, Editor
Affiliations:
1 Iowa State University; Institute for Physical Research and Technology (IPRT), United States , ou_persistent22            
Publ. Info: Philadelphia : Gordon and Breach
Pages: - Volume / Issue: 291 (1) Sequence Number: - Start / End Page: 163 - 173 Identifier: ISSN: 1058-725X
CoNE: https://pure.mpg.de/cone/journals/resource/111056646394066