Journal
JOURNAL OF MAGNETIC RESONANCE
Volume 292, Issue -, Pages 1-7Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2018.04.013
Keywords
CEST; cos-modulated waveform; DANTE; Selective excitation; Chemical exchange
Funding
- Canadian Institutes of Health Research (CIHR)
- French National Center for Scientific Research (CNRS)
- CIHR
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Chemical Exchange Saturation Transfer (CEST) has emerged as a powerful tool for studies of biomolecular conformational exchange involving the interconversion between a major, visible conformer and one or more minor, invisible states. Applications typically entail recording a large number of 2D datasets, each of which differs in the position of a weak radio frequency field, so as to generate a CEST profile for each nucleus from which the chemical shifts of spins in the invisible state(s) are obtained. Here we compare a number of band-selective CEST schemes for speeding up the process using either DANTE or cosine-modulated excitation approaches. We show that while both are essentially identical for applications such as N-15 CEST, in cases where the probed spins are dipolar or scalar coupled to other like spins there can be advantages for the cosine-excitation scheme. (C) 2018 Elsevier Inc. All rights reserved.
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