Table 1 Amino acid composition of basal ileal endogenous protein (g/100 g crude protein) in different classes of poultry, in comparison to those reported in pigs (all measured using the enzyme hydrolysed casein method)
From: Progress in ileal endogenous amino acid flow research in poultry
Amino acida | Broilersb | Layersb | Roostersb | Growing pigsc |
|---|---|---|---|---|
Aspartic acid | 7.2 | 7.4 | 7.9 | 7.7 |
Threonine | 6.3 | 7.5 | 7.0 | 5.1 |
Serine | 6.0 | 6.2 | 8.3 | 6.7 |
Glutamic acid | 13.7 | 10.5 | 15.1 | 16.5 |
Proline | 7.8 | 6.4 | 6.6 | 11.8 |
Glycine | 5.2 | 5.8 | 6.2 | 7.8 |
Alanine | 3.4 | 5.2 | 3.1 | 3.7 |
Valine | 4.6 | 4.9 | 5.5 | 4.0 |
Isoleucine | 3.4 | 3.3 | 4.7 | 3.4 |
Leucine | 4.7 | 4.9 | 4.7 | 4.1 |
Tyrosine | 2.6 | 2.7 | 2.3 | 2.2 |
Phenylalanine | 3.4 | 3.4 | 2.9 | 2.4 |
Histidine | 2.3 | 2.4 | 2.2 | 2.0 |
Lysine | 3.0 | 3.2 | 3.6 | 3.0 |
Arginine | 3.0 | 3.0 | 2.5 | 2.7 |
Methionine | 1.3 | 1.2 | 1.1 | – |
Cysteine | 2.0 | 2.3 | 2.1 | – |