R. Warmke et Hd. Belitz, INFLUENCE OF GLUTAMIC-ACID ON THE BITTER TASTE OF VARIOUS COMPOUNDS, Zeitschrift fur Lebensmittel-Untersuchung und -Forschung, 197(2), 1993, pp. 132-133
The bitter taste of L-valine, L-tryptophan, L-trileucine and a tryptic
hydrolysate of alpha(s1)-casein was diminished to 17-35% of its origi
nal strength by glutamic acid in a molar excess between 0.6 and 14. Th
e bitter taste of compounds from other structural classes was not (nar
ingin, limonin) or not seriously affected by glutamic acid. The maxima
l effects were decreases in bitterness to 77% (caffeine) and 71% (quin
ine) of the original value, respectively. The results indicate the exi
stence of various bitter receptors.