Table 1.

Experimental diets

Ingredient	Casein	GMP	Amino Acid
Protein
Casein	200
BioPure GMP*		200
l-Arginine HCl		4.6	12.1†
l-Cystine	3.0		3.5
l-Histidine, HCl-H2O		3.2	4.5
l-Leucine		6.8	11.1
l-Methionine		7.0	8.2
l-Phenylalanine		1.64	2.5
l-Tyrosine		5.0	5.0
l-Tryptophan		1.3	1.8
Carbohydrate
Sucrose	250	250	250
Cornstarch	241	225	268
Maltodextrin	130	130	130
Cellulose	50	50	50
Fat
Soybean oil	70	70	70
Choline bitartrate	2.5	2.5	2.5
Vitamins and Minerals
Vitamin mix AIN-93-VX	13	13	13
Mineral mix, 98057‡	35	35	35
Sodium chloride	4.2		3.6
Sodium phosphate, dibasic	7.2		8.0
Potassium phosphate, dibasic	2.0		2.0
Calcium phosphate, dibasic			5.25
Calcium phosphate, monobasic		9.5
Calcium carbonate	13.7	6.75	9.9
Antioxidant
t-Butylhydroquinone	0.014	0.014	0.014

Values are in g/kg. GMP, glycomacropeptide.

^*BioPURE GMP; Davisco Foods International, Inc., LeSueur, MN.

^†In addition, the following l-amino acids were included for a total of 175 g amino acids/kg diet: alanine, 3.5; asparagine, 6.0; aspartic acid, 3.5; glutamic acid, 40; glycine, 23.3; isoleucine, 8.2; lysine HCl, 18.0; proline, 3.5; serine, 3.5; threonine, 8.2; and valine, 8.2, based on Rogers and Harper (48).

^‡Teklad Custom Diets, Madison, WI; mineral mix without calcium and phosphorus.