FEBS Letters
Article . 1987 . Peer-reviewed
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The photosystem of the green sulfur bacteriumChlorobium limicolacontains two early electron acceptors similar to photosystem I
Authors: Nitschke, Wolfgang; Feiler, Ute; Lockau, Wolfgang; Hauska, Günter;
The photosystem of the green sulfur bacteriumChlorobium limicolacontains two early electron acceptors similar to photosystem I
Abstract
An asymmetric EPR‐line with agfactor of 2.0045 was detected after phototrapping at 196 K in membranes and in isolated photoactive P840 reaction centers ofChlorobium limicolaf. thiosulfatophilum. The spectra resemble those of the electron acceptor A−1of photosystem I in chloroplasts and cyanobacteria. At 229 K a symmetric signal atg=2.0033, comparable to the one of the early electron acceptor A−0is additionally phototrapped. In contrast to membranes, the reaction center preparation does not contain appreciable amounts of photoreducible FeS‐centers.
Related Organizations
- University of Regensburg Germany
- University of Regensburg (UR) Germany
Keywords
Bacterial photosynthesis, Phototrapping, Reaction center, EPR, (Green sulfur bacteria, Chlorobium)
Bacterial photosynthesis, Phototrapping, Reaction center, EPR, (Green sulfur bacteria, Chlorobium)
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