The assignment of the NMR spectra of natural abundance medium-sized solid-state organic molecules still represents a challenging problem. In this paper, we show that a complete assignment of all the carbon-13, nitrogen-15, and proton NMR lines of a natural abundance solid peptide can be performed by combining various one-bond and multiple-bond correlation techniques for rotating solids. The assignment of the MAS spectra is shown to be unambiguous and relatively straightforward.
Geoffrey Bodenhausen, Fabien Ferrage
David Lyndon Emsley, Gabriele Stevanato, Pinelopi Moutzouri, Federico Maria Paruzzo, Bruno Simões de Almeida