TABLE 1.

Composition of [U-²H]-labeled crystalline amino acid mix

Amino acids	Concentration, %
l-Lysine:2HCl	12
l-Leucine	9
l-Glutamic acid	9
l-Aspartic acid	8
l-Alanine	6
l-Arginine:HCl	6
l-Glutamine	5
Glycine	5
l-Asparagine:H2O	5
l-Proline	5
l-Phenylalanine	4
l-Valine	4
l-Serine	4
l-Threonine	4
l-Tyrosine	3
l-Isoleucine	3
l-Tryptophan	3
l-Cysteine	3
l-Histidine:HCl:H2O	1
l-Methionine	1