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Femtosecond energy-transfer processes in the B800–850 light-harvesting complex of Rhodobacter sphaeroides 2.4.1
Open accessAbstract
The B800-to-B850 energy transfer time in the purified B800-850 light-harvesting complex of Rhodobacter sphaeroides 2.4.1 is determined to be 0.7 ps at room temperature. The electronic state dynamics of the principal carotenoid of this species, spheroidene, are examined, both in vivo and in vitro, by direct femtosecond time-resolved experiments and by fluorescence emission yield studies. Evidence is presented which suggests that carotenoid-to-bacteriochlorophyll energy transfer may occur directly from the initially excited carotenoid S2 state, as well as from the carotenoid S1 state. Further support for this conjecture is obtained from calculations of energy transfer rates from the carotenoid S2 state. Previous measurements of in vivo carotenoid and B800 dynamics are discussed in light of the new results, and currently unresolved issues are described.
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Citations
Cited by
Energy transfer and trapping in photosynthesis
van Grondelle, R., Dekker, J. P., Gillbro, T., & Sundstrom, V. (1994) · Biochimica et Biophysica Acta (BBA) - Bioenergetics · doi:10.1016/0005-2728(94)90166-x · Cited by 1,042
Ultrafast Dynamics of Carotenoid Excited States−From Solution to Natural and Artificial Systems
Polívka, T., & Sundström, V. (2004) · Chemical Reviews · doi:10.1021/cr020674n · Cited by 889
Photosynthetic Light-Harvesting Pigment−Protein Complexes: Toward Understanding How and Why
Pullerits, T., & Sundström, V. (1996) · Accounts of Chemical Research · doi:10.1021/ar950110o · Cited by 566
Architecture and mechanism of the light-harvesting apparatus of purple bacteria
Hu, X., Damjanović, A., Ritz, T., & Schulten, K. (1998) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.95.11.5935 · Cited by 417
Photophysics of the carotenoids associated with the xanthophyll cycle in photosynthesis
Frank, H. A., Cua, A., Chynwat, V., Young, A., Gosztola, D., & Wasielewski, M. R. (1994) · Photosynthesis Research · doi:10.1007/bf02183041 · Cited by 393
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Metadata
- Authors
- Shreve, A. P., Trautman, J. K., Frank, H. A., Owens, T. G., & Albrecht, A. C.
- Venue
- Biochimica et Biophysica Acta (BBA) - Bioenergetics
- Publisher
- Elsevier BV
- Published
- 1991-06
- Volume
- 1058
- Issue
- 2
- Pages
- 280-288
- ISSN
- 0005-2728 (ISSN-L)
- OpenAlex
- W2011060480
- Cited by
- 191
- References
- 0
- FWCI
- 6.40
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- CoChat. (2026). Citation check: Femtosecond energy-transfer processes in the B800–850 light-harvesting complex of Rhodobacter sphaeroides 2.4.1. https://app.cochat.ai/papers/10.1016/s0005-2728(05)80248-8
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- Shreve, A. P., Trautman, J. K., Frank, H. A., Owens, T. G., & Albrecht, A. C. (1991). Femtosecond energy-transfer processes in the B800–850 light-harvesting complex of Rhodobacter sphaeroides 2.4.1. Biochimica et Biophysica Acta (BBA) - Bioenergetics. https://doi.org/10.1016/s0005-2728(05)80248-8
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