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- W2000984793 abstract "X-ray absorption near-edge structure (XANES) spectra of ferric myoglobin from horse heart have been acquired as a function of pH (between 5.3 and 11.3). At pH = 11.3 temperature-dependent spectra (between 20 and 293 K) have been collected as well. Experimental data solve three main conformations of the Fe-heme: the first, at low pH, is related to high-spin aquomet-myoglobin (Mb+OH2). The other two, at pH 11.3, are related to hydroxymet-myoglobin (Mb+OH−), and are in thermal equilibrium, corresponding to high- and low-spin Mb+OH−. The structure of the three Fe-heme conformations has been assigned according to spin-resolved multiple scattering simulations and fitting of the XANES data. The chemical transition between Mb+OH2 and high-spin Mb+OH−, and the spin transition of Mb+OH−, are accompanied by changes of the Fe coordination sphere due to its movement toward the heme plane, coupled to an increase of the axial asymmetry." @default.
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- W2000984793 date "1998-12-01" @default.
- W2000984793 modified "2023-10-13" @default.
- W2000984793 title "Fe-Heme Conformations in Ferric Myoglobin" @default.
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- W2000984793 doi "https://doi.org/10.1016/s0006-3495(98)77757-4" @default.
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