A team of researchers have developed a biomimetic mineralization of calcium carbonate using a multifunctional peptide template that can self-supply mineral sources, which in this case is a supply of carbonate ions, the precursor of calcium carbonate. The process follows the mechanism of biosynthesis of hard tissues by living organisms, called biomineralization, and the ability to form hydrogels, which is modeled after the reaction environment of living organisms. Previous studies on mineralization have discussed the formation mechanism of inorganic crystals synthesized on templates with only a single function, such as a system supplying an external mineral source or a hydrogel system.