The berrylike fruit of either of two African shrubs, Synsepalum dulcificum or Thaumatococcus daniellii, that, when chewed, causes sour substances to taste sweet. Also called the serendipity berry.

A fruit that contains the intensely studied glycoprotein miraculin. This substance may one day be used as an extremely potent artificial sweetener. Miraculin does not have a taste on its own, and is thus called a taste perception altering protein. The way it works is by fooling taste receptor cells. It is currently hard to mass produce because it is heavily post translationally modified. Extraction of the protein from the fruit is very expensive.

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