Exciton simulations of optical spectra of the FMO complex from the green sulfur bacterium Chlorobium tepidum at 6 K

Article Abstract:

A study was conducted to carry out exciton simulations of optical spectra of the Fenna-Matthews-Olson (FMO) complex from the green sulfur bacterium Chlorobium tepidum at 6 K. SDS-PAGe was utilized to purity preparations of the FMO complex of C. tepidum and Prosteocochloris astuari. Results suggested that spectroscopic differences between the FMO complex of C. tepidum and P. astuari may be correlated with structural variations related to hydrogen bonding and planarity of the porphyrin rings.

Hydrogen bonding, Hydrogen bonds, Sulfur bacteria, Porphyrins

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Fluorescence spectroscopy, exciton dynamics, and photochemistry of single alloyphycocyanin trimers

Article Abstract:

A study was conducted to examine allophycocyanin trimer (APC), a light-harvesting protein complex from cyanobacteria. Single-molecule measurements of the fluorescence spectra, intensity trajectories and polarization modules were carried out to analyze APC. Experimental results indicated that APC trimer can be considered as three pairs of two excitonic states associated with the coupled alpha-84 and beta-84 chromophores.

Proteins, Photochemical research

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Ultrafast laser pulse control of exciton dynamics: a computational study on the FMO complex

Article Abstract:

Femtosecond laser-pulse-induced spatial localization of excitation energy in the FMO complex is suggested theoretically. The manner in which excitation energy relaxation and dephasing, as well as the length and overall intensity of the control pulse, determine the control yield is discussed.

Laser pulses, Ultrashort, Ultrashort laser pulses

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