Phenylthiocarbamide: Phenylthiocarbamide, also known as PTC, or phenylthiourea, is a bitter organic compound made by many plants, including broccoli and Brussels sprouts that use it as a repellent to protect against herbivores.
The proportion of people able to detect the taste of PTC at small concentrations varies greatly: from a minimum of 53% in Andhra Pradesh (India) to a maximum of 97% among Amerindians. The ability to taste the PTC...
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