Authors: Thomas Bauer Julia Gath Andreas Hunkeler Matthias Ernst Anja Böckmann Beat H Meier
Publish Date: 2016/12/27
Volume: 67, Issue: 1, Pages: 15-22
Abstract
Ice in addition to “liquid” water and protein is an important component of protein samples for NMR spectroscopy at subfreezing temperatures but it has rarely been observed spectroscopically in this context We characterize its spectroscopic behavior in the temperature range from 100 to 273 K and find that it behaves like pure water ice The interference of magicangle spinning MAS as well as rf multiplepulse sequences with Bjerrumdefect motion greatly influences the ice spectraWe thank P K Madhu for interesting discussions on homonuclear decoupling This work has been supported by the Swiss National Science Foundation Grant 200020 159707 and 200020 146757 the ETH Zurich Research Grant ETH08 101 and the French ANR ANR12BS08 001301 ANR14CE090024B
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