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Intermediate states between P* and Pf in bacterial reaction centers, as detected by the fluorescence kinetics
Author(s) -
Sebban Pierre,
Barbet Jean Claude
Publication year - 1984
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(84)80024-1
Subject(s) - fluorescence , kinetics , photosynthetic reaction centre , photochemistry , chemistry , redox , rhodobacter sphaeroides , mutant , strain (injury) , biophysics , biochemistry , biology , electron transfer , photosynthesis , organic chemistry , anatomy , physics , quantum mechanics , gene
The fluorescence lifetimes of the reaction centers isolated from the wild‐type Rhodopseudomonas sphaeroides purple bacterium and those from the R26 mutant strain, lacking the carotenoid, were measured at low redox potential. In addition to the prompt fluorescence occurring directly from P* and the long delayed emission related to the radical pair state Pf, two other components are present. We suggest that they may come from intermediate states between P* and Pf, or reflect the stabilization of Pf itself.