High-magnification TEM images of seed-dependent amyloid fibrils with the various concentrations of SDS. R- (A–D), C- (E–H), and H-type (I–L) peptides. SDS was added at 0 (A, E, and I), 0.01 (B, F, and J), 0.1 (C, G, and K), and 1.0 mm (D, H, and L). The addition of SDS did not have any significant effects on the morphology of the amyloid fibrils. The scale bars represent 200 nm.