Bitter Taste Perception Test (IMAGE)
Caption
Researchers from the University of Pennsylvania asked 296 Africans from a variety of groups -- here, a group of Yaaku people in Kenya -- to perform "taste tests" of progressively more concentrated solutions of salicin and report when they could detect a bitter taste. They matched the participants' genotypes onto their phenotypes, and found one genetic variant, prevalent in East African people, correlated with a high sensitivity to salicin's bitterness.
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University of Pennsylvania
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