amino acid kinetics were measured in the postabsorptive state using three 4-h infusions of l- [ 1-13c ] leucine , l- [ phenyl-2h5 ] -phenylalanine , l- [ 2-15n ] glutamine , and l- [ 1-13c ] alanine tracers 1 ) before , 2 ) at 12 h , and 3 ) at 60 h of cortisol infusion .
C0002520
amino acid
C0017797
glutamine