male healthy subjects , fasting 12 hours , ingested increasing amounts of a mixture containing a fixed proportion of seven essential amino acids ( l-isoleucine 11.5 % , l-leucine 18.0 % , l-lysine 13.1 % , l-methionine 18.0 % , l-phenylalanine 18.0 % , l-threonine 8.2 % , l-valine 13.1 % ) and lacking tryptophan .
C0002525
essential amino acids
C0040005
l-threonine