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|Title:||1H-13C selective NOE studies of the decapeptide gramicidin S||Authors:||Niccolai, Neri
Gibbons, A. W.
|Issue Date:||1984||Project:||None||Journal:||BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS||Abstract:||
The cyclic decapeptide gramicidin S has been used as a model biopolymer to test the reliability of a strcutural method which is based on a relaxation analysis of heteronuclear selective NOEs. The observation of through-the-space dipolar couplings between intra- and inter residue amide protons and carbonyl carbons, perfectly consistent with the well established peptide solution conformation, confirms the effectiveness of this structural approach. As a corollary of the latter, carbonyl carbon resonances are unequivocally assigned. Moreover, a direct experimental proof of a Orn-NH2 → Phe CO hydrogen bonding is here given
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