The photosystem of the green sulfur bacteriumChlorobium limicolacontains two early electron acceptors similar to photosystem I
- 29 June 1987
- journal article
- Published by Wiley in FEBS Letters
- Vol. 218 (2) , 283-286
- https://doi.org/10.1016/0014-5793(87)81062-1
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.Keywords
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