Amino acid | Age of chickens |
---|
| 0 to 21 d2 | 21 to 42 d3 | 42 to 56 d4 |
---|
Alanine | 102 | 102 | 102 |
Arginine | 105 | 108 | 108 |
Asparagine | 56 | 56 | 56 |
Aspartate | 66 | 66 | 66 |
Cysteine | 32 | 33 | 33 |
Glutamate | 178 | 178 | 178 |
Glutamine | 128 | 128 | 128 |
Glycine | 176 | 176 | 176 |
Histidine | 35 | 35 | 35 |
Isoleucine | 67 | 69 | 69 |
Leucine | 109 | 109 | 109 |
Lysine | 100 | 100 | 100 |
Methionine | 40 | 42 | 42 |
Phenylalanine | 60 | 60 | 60 |
Proline | 184 | 184 | 184 |
Serine | 69 | 69 | 69 |
Threonine | 67 | 70 | 70 |
Tryptophan | 16 | 17 | 17 |
Tyrosine | 45 | 45 | 45 |
Valine | 77 | 80 | 80 |
- 1Except for glycine, all amino acids are L-isomers. Values are based on true ileal digestible amino acids.
- 2Patterns of amino acid composition in the ideal protein are the same for male and female chickens. The amounts of digestible lysine in diet (as-fed basis; 90% dry matter) are 1.12% and 1.02% for male and female chickens, respectively.
- 3Patterns of amino acid composition in the ideal protein are the same for male and female chickens. The amounts of digestible lysine in diets (as-fed basis; 90% dry matter) are 0.89% and 0.84% for male and female chickens, respectively.
- 4Patterns of amino acid composition in the ideal protein are the same for male and female chickens. The amounts of digestible lysine in diets (as-fed basis; 90% dry matter) are 0.76% and 0.73% for male and female chickens, respectively.