Table 2.
Components contributing to amino acid metabolism and retention as used in the InraPorc model
| Item | Basal endogenous, g/kg DM intake | Integuments, mg/kg BW 0.75 /d | Minimum turnover, mg/kg BW 0.75 /d | Body protein composition, % | Ideal protein, % | Maximum efficiency, % 1 |
|---|---|---|---|---|---|---|
| Lys | 0.313 | 4.5 | 23.9 | 6.96 | 100 | 72 |
| Met | 0.087 | 1.0 | 7.0 | 1.88 | 30 | 64 |
| Cys | 0.140 | 4.7 | 4.7 | 1.03 | 30 | 37 |
| Thr | 0.330 | 3.3 | 13.8 | 3.70 | 65 | 61 |
| Trp | 0.117 | 0.9 | 3.5 | 0.95 | 18 | 57 |
| Val | 0.357 | 3.8 | 16.4 | 4.67 | 70 | 71 |
| Ile | 0.257 | 2.5 | 12.4 | 3.46 | 55 | 67 |
| Leu | 0.427 | 5.3 | 27.1 | 7.17 | 100 | 76 |
| Phe | 0.273 | 3.0 | 13.7 | 3.78 | 50 | 82 |
| Tyr | 0.223 | 1.9 | 9.0 | 2.86 | 45 | 67 |
| His | 0.130 | 1.3 | 10.2 | 2.79 | 32 | 93 |
| Arg | 0.280 | 0.0 | 0.0 | 6.26 | 42 | 154 |
| Protein | 8.517 | 104.4 | 361.1 | - | - | 85 |
1The maximum efficiency was calculated from the ideal protein profile and the composition of body protein and components of maintenance. See [15] for details and the text for a numerical example of the calculation.