ISSN:
1573-5079
Keywords:
energy transfer
;
reaction center
;
FMO-protein
;
green sulfur bacterium (Chlorobium tepidum, Prosthecochloris aestuarii)
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The Fenna-Matthews-Olson (FMO)-protein and the FMO-reaction center (RC) core complex from the green sulfur bacterium Chlorobium tepidum were examined at 6 K by absorption and fluorescence spectroscopy. The absorption spectrum of the RC core complex was obtained by a subtraction method and found to have fiye peaks in the QY region, at 797, 808, 818, 834 and 837 nm. The efficiency of energy transfer from carotenoid to bacteriochlorophyll a in the RC core complex was 23% at 6 K, and from the FMO-protein to the core it was 35%. Energy transfer from the FMO-protein to the core complex was also measured in isolated membranes of Prosthecochloris aestuarii from the action spectra of charge separation. Again, a low efficiency of energy transfer was obtained, both at 6 K and at room temperature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00018222
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