Broad-band quasi-optical HF-EPR spectroscopy: Application to the study of the 
ferrous iron center from a rubredoxin mutant

Barra, A. L.; Hassan, A. K.; Janoschka, A.; Schmidt, C. L.; Schünemann, V.

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Broad-band quasi-optical HF-EPR spectroscopy: Application to the study of the ferrous iron center from a rubredoxin mutant

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Barra, A. L.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Hassan, A. K.
High Magnetic Field Laboratory, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Schmidt, C. L.
Abteilung Jansen, Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

Schünemann, V.
Max Planck Society;

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Citation

Barra, A. L., Hassan, A. K., Janoschka, A., Schmidt, C. L., & Schünemann, V. (2006). Broad-band quasi-optical HF-EPR spectroscopy: Application to the study of the ferrous iron center from a rubredoxin mutant. Applied Magnetic Resonance, 30(3-4), 385-397.

Cite as: https://hdl.handle.net/21.11116/0000-000E-FF97-9

Abstract

High-frequency electron paramagnetic resonance (HF-EPR) allows
obtaining detailed information on the anisotropy of integer-spin
systems, which are usually silent at conventional EPR frequencies (X-
or Q-bands). However, the studies performed so far on integer-spin
systems have mostly dealt with synthetic complexes. In this paper, we
present first results obtained on a mononuclear high-spin ferrous iron
center of a rubredoxin-type protein. This study shows that the
broadband quasi-optical technique of HF-EPR is a suitable approach
towards the study of biologically relevant metal centers with large
zero-field splittings.