They are: (i) the fragment corresponding to the 2nd helix (residues 264–277) of the C-terminal domain of nucleophosmin 1 (NPM1264–277), which is able to form amyloid-like assemblies and fibrils toxic to neuroblastoma cells [28,29,30,31,32,33] and (ii) the fragment spanning residues 21–40 of the beta-amyloid peptide Aβ (Aβ21–40) [34]. The gene discussed is NPM1; the disease is neuroblastoma.