mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal University10.26907/mrsej-25202mrisel-279Research ArticleСтатьиTwo-dimensional normal distribution of zero field splitting parameters for EPR spectra of human serum transferrinIbragimovaM. I.

Kazan

ibragimova@kfti.knc.ruChushnikovA. I.

Kazan

YatsykI. V.

Kazan

GumarovG. G.

Kazan

Zavoisky Physical-Technical Institute, FRC Kazan Scientific Center of RASRussian Federation20251106202527225202 (11 pp.)Copyright © Ibragimova M.I., Chushnikov A.I., Yatsyk I.V., Gumarov G.G., 20252025Ibragimova M.I., Chushnikov A.I., Yatsyk I.V., Gumarov G.G.Ibragimova M.I., Chushnikov A.I., Yatsyk I.V., Gumarov G.G.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/279

n approximation of a distribution of zero field splitting (ZFS) parameters by using two-dimensional normal distributions in discrete representation is proposed. The results of modelling the X-band EPR spectra of human serum transferrin are in a good accordance with experiment. For a number of studied EPR spectra, it was found that the desired distribution consists of two components with various rhombicity parameters. The first component is characterized by a relative high degree of correlation between the parameters E and D. For the second component of ZFS, which we associate with iron bound to the C-lobe iron site of human serum transferrin, a high dispersion of the correlation coefficient is observed.

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