Nuclear Magnetic Resonance Spectroscopy. Carbon-13 Spin-Lattice Relaxation Time Measurements of Amino Acids
Open Access
- 1 May 1974
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 71 (5) , 2096-2097
- https://doi.org/10.1073/pnas.71.5.2096
Abstract
The 13C spin-lattice relaxation times, T1's, of several amino acids have been measured as a function of pD and concentration. A strong dependence of the carboxyl carbon T1 was observed for both pD and concentration and is believed to be due to intermolecular associations. For the carboxyl carbon, spin rotation is proposed as the predominant relaxation mechanism, whereas the other carbons are relaxed mainly by the dipole-dipole mechanism, and their relaxation times are relatively independent of changes in concentration and pD.Keywords
This publication has 3 references indexed in Scilit:
- Study of internal rotations in gramicidin S by carbon-13 spin-lattice relaxation measurementsJournal of the American Chemical Society, 1973
- Intramolecular motion in peptides determined by 13C NMR: A spin‐lattice relaxation time‐study on MSH‐release‐inhibiting factorFEBS Letters, 1973
- Carbon‐13 nuclear magnetic resonance studies on thyrotropin‐releasing factor and related peptidesFEBS Letters, 1973