a control diet of corn sugar , cornstarch , whey , l-glutamic acid , solka floc , soybean oil , amino acids , minerals and vitamins was supplemented with l-phe to provide .175 , .250 , .325 , .400 , .475 and .550 % phe and .47 % tyr .
C0061472
l-glutamic acid
C0002520
amino acids