A 2 mM aqueous stock solution was prepared by dissolving 1.2 mg building-block (Fig. . Peptide amino acids sequence: Gly-Leu-Lys-Phe-Lys) in 607 µL borate buffer (50 mM, pH 8.12). Samples were prepared by adding 250 µL of the stock solution to a UPLC vial (dimensions 12×32 mm) and diluting it with 750 µL borate buffer. A Teflon coated stirring bar (dimensions 5×2 mm) was added to some of the samples and the vials were closed with a Teflon-lined screw cap. these the hexamer self-assembles. The kinetics of autocatalytic formation of hexamer is highly sensitive to agitation, with growth rate depending linearly on the number of fiber ends. Fibers are fragile and the number of fiber ends is determined by the agitation regime.