Electron paramagnetic resonance (EPR) spectroscopy and 02 evolution assays were performed on photosystem II (PSII) membranes which had been treated with 1 M CaC12 to release the 17, 23 and 33 kilodalton (kDa) extrinsic polypeptides. Manganese was not released from PSII membranes by this treatment as
Stuctures and oxidation states of MN in several S-states of photosystems II determined by xas
โ Scribed by R.D. Guiles; A.E. McDermott; V.J. DeRose; J.-L. Zimmermann; V.K. Yachandra; K. Sauer; M.P. Klein
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 84 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0162-0134
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## CO~IXIUNICATIONS It was a surprise that the amount of gold found in various collections was of the same order of magnitude. As a check of the terrestrial contamination accumulated by the mcshcs, the non-magnetic fraction from a few collections was analyzed in the same manner as mentioned above.
The NMR paramagnetic relaxation enhancement (NMR-PRE) produced in the solvent proton resonance by manganese in the S o and S 2 states of the oxygen evolving center (OEC) has been recorded for three Photosystem II (PS II)-enriched preparations: (1) PS II-enriched thylakoid membrane fragments (TMF-2 p