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Application of quadrupolar 131Xe-NMR relaxation to the study of macromolecular systems

โœ Scribed by Giuseppe Saba; Mariano Casu; Adolfo Lai

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
397 KB
Volume
59
Category
Article
ISSN
0020-7608

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โœฆ Synopsis

Xe-NMR longitudinal relaxation rates have been measured by the inversion recovery 131 method for xenon in presence of lecithin vesicles or a small protein charybdotoxin. The transverse relaxation rates in the same spectra have been obtained by spectral deconvolution. The results show that xenon in lecithin vesicles is in a rapid exchange between free and bound sites and that averaging of the electric-field gradient at the Xe nucleus is a two-step process. From these results, estimates have been obtained for the parameters entering the I3'Xe quadrupolar interaction.

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