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Expanded 13C solid-state NMR spectra (10−70 ppm) of N. clavata dragline silk fibers together with assignments: (a) 13C refocused 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 [59].
