A STUDY OF CYTOCHROME c AND CYTOCHROME b2 CORE IN THE OXIDIZED AND REDUCED STATES USING EXAFS AND XANES SPECTROSCOPIESReport as inadecuate




A STUDY OF CYTOCHROME c AND CYTOCHROME b2 CORE IN THE OXIDIZED AND REDUCED STATES USING EXAFS AND XANES SPECTROSCOPIES - Download this document for free, or read online. Document in PDF available to download.



Abstract : We report the first structural investigation of cytochrome b2 core : the average Fe

.N distance 1,97±0,02Å is quite comparable to the Fe

.N distance of cytochrome c and of other low spin hexacoordinated porphyrin complexes. As regards cytochrome c no difference of the average Fe

.N distance greater than 0.02Å was detected between reduced and oxidized states. However the contribution of the axial Fe

.S shell can be weak and obviously depends upon the sample preparation. A systemate shift of 2.1 eV of the edge is observed between oxidized and reduced states but the prepeak which is well resolved for oxidized cytochrome c exhibits a smaller shift of less than 1.0 eV





Author: I. Ascone J. Goulon A. Bianconi M. Tegoni F. Labeyrie

Source: https://hal.archives-ouvertes.fr/



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