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High-frequency 263 GHz PELDOR.

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Tkach,  I.
Research Group of Electron Paramagnetic Resonance, MPI for biophysical chemistry, Max Planck Society;

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Halbmair,  K.
Research Group of Electron Paramagnetic Resonance, MPI for biophysical chemistry, Max Planck Society;

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Höbartner,  C.
Research Group of Nucleic Acid Chemistry, MPI for biophysical chemistry, Max Planck Society;

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Bennati,  M.
Research Group of Electron Paramagnetic Resonance, MPI for biophysical chemistry, Max Planck Society;

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Citation

Tkach, I., Halbmair, K., Höbartner, C., & Bennati, M. (2014). High-frequency 263 GHz PELDOR. Applied Magnetic Resonance, 45(10), 969-979. doi:10.1007/s00723-014-0581-z.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-42FA-3
Abstract
Pulsed electron-electron double resonance (PELDOR/DEER) at high frequencies can provide information on the relative orientation of paramagnetic centres or spin labels, if those are rigidly oriented in a host biomolecule and experiments are performed with sufficient orientation selectivity. We present the first comparative PELDOR study at 263 and 94 GHz on a model RNA system containing rigid nitroxides. We show that at 263 GHz still considerable modulation depth is observed and orientation selectivity is significant, particularly in g (x)-g (y) plane of the nitroxides.