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  Orientation selection in distance measurements between nitroxide spin labels at 94 GHz EPR with variable dual frequency irradiation

Tkach, I., Pornsuwan, S., Höbartner, C., Wachowius, F., Sigurdsson, S., Baranova, T. Y., et al. (2013). Orientation selection in distance measurements between nitroxide spin labels at 94 GHz EPR with variable dual frequency irradiation. Physical Chemistry Chemical Physics, 15(10), 3433-3437. doi:10.1039/c3cp44415e.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-801F-F Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-E555-B
Genre: Journal Article

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 Creators:
Tkach, I.1, Author              
Pornsuwan, S., Author
Höbartner, C.2, Author              
Wachowius, F.2, Author              
Sigurdsson, S., Author
Baranova, T. Y., Author
Diederichsen, U., Author
Sicoli, G.1, Author              
Bennati, M.1, Author              
Affiliations:
1Research Group of Electron Paramagnetic Resonance, MPI for biophysical chemistry, Max Planck Society, ou_578606              
2Research Group of Nucleic Acid Chemistry, MPI for biophysical chemistry, Max Planck Society, ou_578605              

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 Abstract: Pulsed electron–electron double resonance (PELDOR, also known as DEER) has become a method of choice to measure distances in biomolecules. In this work we show how the performance of the method can be improved at high EPR frequencies (94 GHz) using variable dual frequency irradiation in a dual mode cavity in order to obtain enhanced resolution toward orientation selection. Dipolar evolution traces of a representative RNA duplex and an α-helical peptide were analysed in terms of possible bi-radical structures by considering the inherent ambiguity of symmetry-related solutions.

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Language(s): eng - English
 Dates: 2013-01-172013-03-13
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1039/c3cp44415e
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Title: Physical Chemistry Chemical Physics
Source Genre: Journal
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Pages: - Volume / Issue: 15 (10) Sequence Number: - Start / End Page: 3433 - 3437 Identifier: -