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13C solid-state NMR spectra (a–d) of 47-mer peptides with 13C-labeled motifs; (A) [2-13C]Gly25[3-13C]Ala26 [1-13C]Gly27 and (B) [2-13C]Gly35[3-13C]Ala36 [1-13C]Gly37. (a) 13C r-INEPT, (b) 13C DD/MAS and (c) 13C CP/MAS spectra in the hydrated state, and (d) 13C CP/MAS spectrum in the dry state [60]. The peaks marked by asterisk * were assigned to Ala Cα peaks of non-labeled (Ala)6 in the peptides.
