Fig. 1. Polymorphism of the Aβ(1–40) amyloid fibrils.

Distributions of crossover distance and the maximum width of fibril segment between crossovers for the Aβ(1–40) amyloid fibrils previously reported. Aβ(1–40) amyloid fibrils prepared in 50 mM sodium borate, pH 7.8 at 4 °C²⁴ (black), in 50 mM sodium borate, pH 7.8 at 22 °C²⁵ (green and pink), in 50 mM sodium borate, pH 8.7 at 4 °C²⁷ (cyan), in 50 mM sodium borate, pH 9.0 at 20 °C²³ (red), in 50 mM Tris-HCl, pH 7.4 at room temperature²⁶ (blue), in PBS, pH 7.4 at 37 °C²⁵ (orange).