Evidence for dynamics on a 100 ns time scale from single- and double-quantum nitrogen-14 NMR in solid peptides
Evidence for dynamics on a 100 ns time scale from single- and double-quantum nitrogen-14 NMR in solid peptides
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DOI:
10.1021/ja802603q
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发表时间:
2008-08-20
影响因子:
15
通讯作者:
Bodenhausen, Geoffrey
中科院分区:
文献类型:
--
作者:
Cavadini, Simone;Abraham, Anuji;Bodenhausen, Geoffrey
The indirect detection of N-14 spectra via protons in the manner of heteronuclear multiple-quantum correlation (HMQC) allows one to obtain single- (SQ) and double-quantum (DQ) N-14 spectra in solids. A comparison of the SQ and DQ line widths as a function of temperature with simulations reveals motions in the tripeptide AAG with rates on the order of 10(7) s(-1) at 49 degrees C.