Isotope selection in distance measurements between nitroxides

Jeschke G, Zimmermann H, Godt A (2006)
JOURNAL OF MAGNETIC RESONANCE 180(1): 137-146.

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Abstract
Self-assembly of spin-labeled synthetic macromolecules or biomacrornolecules can lead to structures that contain more than two nitroxide radicals. Label-to-label distance distributions are then poorly resolved since established electron paramagnetic resonance techniques for distance measurements cannot select between the different pairs of nitroxides. A separation into different contributions can be achieved by partially labeling the nitroxide radicals by N-15 or by deuterium and applying pulse electron electron double resonance techniques. With N-15 labeling, strong suppression of either the N-14 or the N-15 contribution can be achieved by Suitable choices of the excitation bandwidths and frequencies of the observer subsequence and pump pulse and linear combination of data sets. With deuterium labeling, interactions between only the isotope-labeled nitroxides can be selected by a two-dimensional version of the four-pulse double electron electron resonance experiment. This selection is based on the deep electron spin echo envelope modulation of deuterated nitroxides. (c) 2006 Elsevier Inc. All rights reserved.
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Jeschke G, Zimmermann H, Godt A. Isotope selection in distance measurements between nitroxides. JOURNAL OF MAGNETIC RESONANCE. 2006;180(1):137-146.
Jeschke, G., Zimmermann, H., & Godt, A. (2006). Isotope selection in distance measurements between nitroxides. JOURNAL OF MAGNETIC RESONANCE, 180(1), 137-146.
Jeschke, G., Zimmermann, H., and Godt, A. (2006). Isotope selection in distance measurements between nitroxides. JOURNAL OF MAGNETIC RESONANCE 180, 137-146.
Jeschke, G., Zimmermann, H., & Godt, A., 2006. Isotope selection in distance measurements between nitroxides. JOURNAL OF MAGNETIC RESONANCE, 180(1), p 137-146.
G. Jeschke, H. Zimmermann, and A. Godt, “Isotope selection in distance measurements between nitroxides”, JOURNAL OF MAGNETIC RESONANCE, vol. 180, 2006, pp. 137-146.
Jeschke, G., Zimmermann, H., Godt, A.: Isotope selection in distance measurements between nitroxides. JOURNAL OF MAGNETIC RESONANCE. 180, 137-146 (2006).
Jeschke, G, Zimmermann, H, and Godt, Adelheid. “Isotope selection in distance measurements between nitroxides”. JOURNAL OF MAGNETIC RESONANCE 180.1 (2006): 137-146.
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