A nitrogen-14 nuclear magnetic resonance study of amino-acids, peptides, and other biologically interesting molecules

Abstract

14 N Nuclear resonances have been observed in a 7·5 T magnetic resonance spectrometer. 55 Compounds of biological interest were studied in aqueous solutions of concentration ca. 200 mM, and the chemical shifts and relaxation times of the 14N resonances recorded. The chemical shifts are discussed in terms of structures, and the relaxation times in terms of nuclear quadrupole coupling constants and molecular correlation times.