15N FT NMR spectra of amino acids in natural abundance. pH dependence of 15N chemical shifts for L-arginine

✍ Scribed by Teruo Suzuki; Takeo Yamaguchi; Mamoru Imanari

• Book ID: 104244255
• Publisher: Elsevier Science
• Year: 1974
• Tongue: French
• Weight: 178 KB
• Volume: 15
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)93140-5

✦ Synopsis

Natural-abundance 15 N NMR spectra of amino acid methyl esters in strongly acid solutions 1) under proton-decoupled conditions have recently been reported, and l5 N NMR spectra of several 15 N-enriched amino acids in aqueous solutions of varying pH have been studied. 233) We have determined the natural-abundance 15 N FT NMR spectra of eight amino acids4) to investigate the influence of pH on those for L-arginine. All 15N NMR signals for the amino acids were assigned by complete proton-decoupling and proton-undecoupling techniques, and by comparing with 15 N chemical shifts among their homologous compounds. The ls N chemical shifts thus obtained for