rats fasted 15 hours were treated p.o . with increasing amounts ( 660 and 1320 mg/kg body weight ) of a mixture containing a fixed proportion of seven essential amino acids ( l-phenylalanine 13.6 % , l-leucine 6.0 % , l-isoleucine 12.1 % , l-methionine 12.1 % , l-lysine 30.3 % , l-threonine 10.6 % , l-valine 15.2 % ) and lacking tryptophan .
C0002525
essential
C0040005
l-threonine