Figure 6.

Molecular models with the indicated symmetries, showing ¹³C atom positions for the specified labeled sites with selected inter-atomic distances. For each panel, an arrow or x indicates the axis of the nanofiber (Class 3R2 β-strands at an angle of 35° from the fiber axis). Black or red ovals indicate atom pairs within the same β-sheet and between different β-sheets, respectively. Molecular simulations predict variation of less than 8% for distance between otherwise equivalent pairs of spins within a nanofiber.