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In photosynthetic green sulfur bacteria excitation energy is transferred from large bacteriochlorophyll (BChl) c chlorosome antennas via small BChl a antennas to the reaction centers which then transfer electrons from cytochrome c to low-potential iron-sulfur proteins. Under oxidizing conditions a reversible mechanism is activated in the chlorosomes which quenches excited BChl c. We used flash-induced...
The chlorosome antenna of the green sulfur bacterium Chlorobium tepidum essentially consists of aggregated bacteriochlorophyll (BChl) c enveloped in a glycolipid monolayer. Small amounts of protein and the isoprenoid quinones chlorobiumquinone (CK) and menaquinone-7 (MK-7) are also present. Treatment of isolated chlorosomes from Cb. tepidum with sodium dodecyl sulfate (SDS) did not affect the quinones,...
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