(A) Self- and cross-seeding experiments with AL-103: de novo at pH 2.0 (black), AL-09 seeds (red), AL-103 seeds (green), AL-12 seeds (blue), κI seeds (brown), and AL-T05 seeds (orange). All reactions were performed with 20 µM protein in the presence of 1% seeds. Transmission electron microscopy (TEM) images of AL-09 at the end point of the reaction. (B) De novo experiment at pH 2.0 in the presence of (C) AL-09 seeds, (D) AL-103 seeds, (E) AL-12 seeds, (F) κI seeds, and (G) AL-T05 seeds. The scale bar represents 200 nm.