Premium
Similarity of primary radical pair recombination in photosystem II and bacterial reaction centers
Author(s) -
Volk Martin,
Gilbert Matthias,
Rousseau Gerhard,
Richter Martin,
Ogrodnik Alexander,
Michel-Beyerle Maria-Elisabeth
Publication year - 1993
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(93)80837-k
Subject(s) - photosystem ii , photosystem i , recombination , photosynthetic reaction centre , chemistry , photochemistry , primary (astronomy) , photosynthesis , biochemistry , electron transfer , physics , astrophysics , gene
We report temperature and magnetic field dependent measurements of the recombination dynamics of the radical pair P680 + Pheo − in D 1 D 2 cytb 559 reaction centers of photosystem II and compare the results to those obtained in bacterial reaction centers. In photosystem II the rate of recombination to the groundstate is found to be slower than in the bacterial reaction centers by a factor of at least 50. This difference arises from the different redox potentials of the pigments of plant and bacterial reaction centers. In contrast, the rate of recombination to the triplet state is similar in all reaction centers, indicating a similar electronic coupling which allows us to conclude upon the structural similarity.