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Low-power homonuclear dipolar recoupling using supercycled symmetry-based and exponentially-modulated pulse sequences
- Source :
-
Chemical Physics Letters . Feb2011, Vol. 503 Issue 4-6, p310-315. 6p. - Publication Year :
- 2011
-
Abstract
- Abstract: Aimed at performing dipolar recoupling as part of biological solid-state NMR experiments without using excessively strong rf irradiation, we present a series of low-power supercycled symmetry-based and exponentially modulated pulse sequences facilitating efficient recoupling over specified chemical shift ranges even at high-speed spinning conditions. The experiments are designed through simple phase modulation of known ‘lower-quality’ symmetry-based pulse sequences or highly rf-demanding exponentially modulated recoupling experiments. The methods are described analytically and numerically and demonstrated experimentally by one- and two-dimensional correlation spectra of 2,3-13C2-L-alanine and the fibrillating-core decapeptide SNNFGAILSS of human Islet Amyloid Poly-Peptide (hIAPP, or amylin) uniformly 13C,15N-labeled at the FGAIL residues. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00092614
- Volume :
- 503
- Issue :
- 4-6
- Database :
- Academic Search Index
- Journal :
- Chemical Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 58097786
- Full Text :
- https://doi.org/10.1016/j.cplett.2010.12.084