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127 I‐NMR studies of anion binding to κ‐carrageenan
Author(s) -
Zhang Wei,
Furó István
Publication year - 1993
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.360331108
Subject(s) - chemistry , relaxation (psychology) , motional narrowing , carrageenan , ion , residence time (fluid dynamics) , nuclear magnetic resonance , spectral line , organic chemistry , physics , psychology , social psychology , biochemistry , geotechnical engineering , astronomy , engineering
A preliminary 127 I‐NMR relaxation study of the binding of the I − ion to κ‐carrageenan is presented. Signal loss caused by motional correlation times out of extreme narrowing makes it difficult to analyze line widths. Longitudinal relaxation times are more suitable for a comprehensive relaxation study. From the observation of nonextreme motional narrowing, the lower limit of the residence time at the binding site is estimated to be on the order of 10 ns. © 1993 John Wiley & Sons, Inc.