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![]() | NATURAL SELECTION AT WORK IN GENETIC VARIATION TO TASTE OR NOT TASTE BITTER COMPOUND, U OF U RESEARCHERS SAY | SALT LAKE CITY - A genetic variation seen worldwide in which people either taste or do not taste a bitter, synthetic compound called PTC has been preserved by natural selection, University of Utah and National Institutes of Health researchers have reported. | Press Releases; University of Utah Health Sciences Center News | 2004-06-23 |