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Effect of A49P genotype on sensitivity to the bitter taste of PROP. The cumulative percentage of children (A) and mothers (B) in each of the 3 allele groups (AA, AP, PP) who first detected a bitter or “yucky” taste when sampling 560, 180, and 56 μmol/L of PROP or who never detected a bitter taste when sampling each of these PROP solutions (none tasted bitter).
