– Miraculin has the property of modifying a sour taste into a sweet taste. This alteration of taste perception persists for many minutes. Miraculin Protein, Synsepalum dulcificum, Recombinant (E. coli, His) is expressed in E. coli expression system with N-10xHis tag. The predicted molecular weight is 24.9 kDa and the accession number is P13087.