| Literature DB >> 10194321 |
T Matsukawa1, H Mino, D Yoneda, A Kawamori.
Abstract
The light-induced new EPR signals at g = 12 and 8 were observed in photosystem II (PS II) membranes by parallel polarization EPR. The signals were generated after two flashes of illumination at room temperature, and the signal intensity had four flashes period oscillation, indicating that the signal origin could be ascribed to the S3-state. Successful simulations were obtained assuming S = 1 spin for the values of the zero-field parameters, D = +/-0.435 +/- 0. 005 cm-1 and E/D = -0.317 +/- 0.002. Orientation dependence of the g =12 and 8 signal intensities shows that the axial direction of the zero-field interaction of the manganese cluster is nearly parallel to the membrane normal.Entities:
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Year: 1999 PMID： 10194321 DOI： 10.1021/bi9818570
Source DB: PubMed Journal: Biochemistry ISSN： 0006-2960 Impact factor: 3.162