Cells miraculin is a tetramer with a weight of 98.4 kDa composed of identical monomers merging dimers. It consists of a single polypeptide of 191 amino acids and two carbohydrate chains attached to Asn-92 and Asn-186. The mass of the polypeptide calculated from the amino acid sequence and carbohydrate content is 24.6 kDa, while 13.9% by weight constitute carbohydrates. The amino acid sequence shows a high analogy soybean trypsin inhibitor. Miraculin encodes a gene encoding 220 amino acids. 29 amino acid residues forms the signal sequence is cleaved from the N end of the post-translational modification.