Contact: Katherine Unger Baillie
University of Pennsylvania
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.
Credit: University of Pennsylvania
Usage Restrictions: In context of reporting on study.
Related news release: Penn team elucidates evolution of bitter taste sensitivity