straight edge: the miracle fruit (synsepalum dulcificum), native to west africa, contains a glycoprotein called miraculin that binds to taste receptors on the tongue and makes sour foods taste sweet.
what makes the fruit strange and miraculous, is miraculin (a sugar substitute), which is found in large quantities in the fruit, combined with a glycoprotein.
该果之所以神奇而且不可思议在于它体内含有大量的叫做「糖脘」的特殊成分。
miraculin is an alkaline glycol-protein which can transform sour to sweet taste.