Determination by X-ray absorption of redox induced structural changes in iron-sulfur cluster Fx in photosystem I

I. Sagi, G. Bunker, Y. Hochman, C. Carmeli, M. T. Zeng

Research output: Contribution to journalArticlepeer-review

Abstract

X-ray absorption spectra of photosystem I core protein containing Fx, the low potential iron-sulfur cluster was measured. X-ray absorption of the iron K-edge was obtained in the reduced and oxidized forms of Fx. An edge shift of 0.5 eV to lower energy and a change in the X-ray absorption near edge structure was observed. Some of the alterations in edge shape of Fx are interpreted to indicate structural changes of the iron-sulfur cluster in Fx upon reduction.

Original languageEnglish
Pages (from-to)871-875
Number of pages5
JournalActa Physica Polonica A
Volume91
Issue number5
DOIs
StatePublished - 1997

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