PTC taste blindness and the taste of caffeine.
D002110:Caffeine; D002628:Chemoreceptor Cells / Q000502:physiology; D006801:Humans; D010670:Phenylthiourea; D013649:Taste; D014508:Urea
D002110:Caffeine; D010670:Phenylthiourea; D014508:Urea