Figure 3:

2D planes from 3D CANH and CAN(H)H spectra (a, left and right, respectively), 3D CONH and CON(H)H spectra (b, left and right, respectively), and a 3D NHH spectrum (c) of ²H,¹⁵N,¹³C-FUS-LC fibrils. Assignments are shown for crosspeaks with maxima within ±0.3 ppm of 43.9 ppm in the ¹³C dimension in panel a, within ±0.4 ppm of 174.1 ppm in the ¹³C dimension in panel b, and within ±0.6 ppm of 110.5 ppm (left) or 121.1 ppm (right) in the ¹⁵N dimension in panel c. Contour levels increase by successive factors of 1.4. 1D slices shown above the 2D sections correspond to the dashed blue and cyan lines. In panels a and b, these slices illustrate the development of additional inter-residue crosspeaks from ¹H-¹H spin polarization transfers in the CAN(H)H and CON(H)H measurements. Spectra were acquired at 14.1 T with 40.00 kHz MAS.