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Lateral view (a) and cross-section (b) of TTR105–115 protofilament. β-Sheets are parallel and in-register along the fibril axis (a) and stacked in an antiparallel manner at the protofilament interface (b). Distances indicated in (b) were obtained via TEDOR measurements (black) and R2TRW (red). Reprinted with permission from Debelouchina et al. 2013. Copyright © 2013 American Chemical Society
