From: Dietary requirements of synthesizable amino acids by animals: a paradigm shift in protein nutrition
Amino acid | Baker’s modified models (1997) for chicks[38]1 | NRC (1994)[37] (0- to 21-d-old chicks)5 | ||
---|---|---|---|---|
0 to 21 d2 | 21 to 42 d3 | 42 to 56 d4 | ||
Lysine | 100 | 100 | 100 | 100 |
Methionine | 36 | 37 | 37 | 42 |
Cystine | 36 | 38 | 38 | 33 |
Threonine | 67 | 70 | 70 | 67 |
Valine | 77 | 80 | 80 | 75 |
Arginine | 105 | 108 | 108 | 104 |
Tryptophan | 16 | 17 | 17 | 17 |
Isoleucine | 67 | 69 | 69 | 67 |
Leucine | 109 | 109 | 109 | 100 |
Histidine | 35 | 35 | 35 | 29 |
Phe + Tyr | 105 | 105 | 105 | 112 |