IAPP and Alzheimer disease: In particular, many small amino acid sequences responsible for the biological assembly proteins such as the amyloid-beta polypeptide (Aβ42) (Qiu et al., 2015), tau proteins (Pîr et al., 2017), and islet amyloid polypeptide (IAPP) (Fawver et al., 2014) indicated in Alzheimer’s disease, have been identified; hence, researchers can design self-assembly peptides through a biomimetic approach.