Fig. 2
From: Molecular architecture of fungal cell walls revealed by solid-state NMR

Chitin is structurally polymorphic in intact A. fumigatus cell walls. a 1D 15N spectrum resolved multiple amide and amine signals. b High-resolution 15N–13C correlations spectra resolved three major types of chitins. c DNP-assisted 15N–15N PAR spectra measured using 5 ms (red) and 15 ms (black) mixing times revealed extensive cross peaks between different chitin allomorphs. d DNP-assisted 15N–13C correlation spectra measured using 3-mg A. fumigatus