to investigate the contribution of branched-chain amino acids as a nitrogen source for alanine in vivo , dogs were infused with l- [ ( 15 ) n ] leucine , l- [ u- ( 14 ) c ] leucine , l- [ 2,3,3,3- ( 2 ) h ( 4 ) ] alanine , and d- [ 6,6- ( 2 ) h ( 2 ) ] -glucose .
C0002521
branched-chain amino acids
C0023401
leucine