EXAFS structural study of FX, the low-potential iron-sulfur center in photosystem I
- 30 September 1989
- journal article
- research article
- Published by American Chemical Society (ACS) in Biochemistry
- Vol. 28 (20) , 8056-8059
- https://doi.org/10.1021/bi00446a013
Abstract
We present iron extended X-ray absorption fine structure (EXAFS) spectra of a photosystem I core preparation containing FX, the very low potential iron-sulfur cluster in photosystem I. The preparation lacks FA and FB. The amplitude of Fe-Fe backscattering in the EXAFS spectrum indicates that FX may be a [4Fe-4S] cluster and is not a [2Fe-2S] cluster or clusters.Keywords
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