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Interpretation of the nitrogen spin densities in the primary donor cation of photosynthetic reaction centers
Author(s) -
Lin Charles P.,
Norris J.R.
Publication year - 1986
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(86)80342-8
Subject(s) - hyperfine structure , chemistry , hyperfine coupling , photosynthetic reaction centre , coupling constant , anisotropy , dimer , monomer , spin (aerodynamics) , nitrogen , crystallography , molecular physics , atomic physics , nuclear magnetic resonance , photochemistry , electron transfer , physics , thermodynamics , particle physics , quantum mechanics , organic chemistry , polymer
Electron spin echo modulation investigation of the primary donor cation radical (P865 .+ ) of photosynthetic reaction centers yields a different set of anisotropic 15 N hyperfine coupling constants from the values previously reported by ENDOR measurements [(1985) Proc. Natl. Acad. Sci. USA 81, 7792‐7796]. The spin densities on the nitrogens, as reflected by our anisotropic coupling constants, support the special pair model for the primary donor cation, whereas spin densities based on anisotropic 15 N hyperfine coupling constants of ENDOR are incompatible with either a monomer or a dimer model.