From: Dietary requirements of synthesizable amino acids by animals: a paradigm shift in protein nutrition
Amino acid | Amino acid content in the carcass Ref.[29] (% of crude protein)2 | Dean & Scott standard (1965) Ref.[33] | Huston & Scott standard (1968) Ref.[34] | Sasse & Baker standard (1973) Ref.[35] | Baker & Han standard (1994) Ref.[36] | ||||
---|---|---|---|---|---|---|---|---|---|
Amount in diet3 | % of lysine | Amount in diet3 | % of lysine | Amount in diet3 | % of lysine | Amount in diet3 | % of lysine | ||
Arginine | 6.65 | 1.10 | 98.2 | 1.00 | 105 | 0.95 | 104 | 0.95 | 106 |
Cystine | --- | 0.35 | 31.3 | 0.35 | 36.8 | 0.35 | 38.5 | 0.325 | 36.1 |
Glycine | --- | 1.60 | 143 | 1.20 | 126 | 0.60 | 65.9 | 0.60 | 66.7 |
Isoleucine | 4.35 | 0.80 | 71.4 | 0.60 | 63.2 | 0.60 | 65.9 | 0.60 | 66.7 |
Histidine | 1.80 | 0.30 | 26.8 | 0.30 | 31.6 | 0.33 | 36.3 | 0.32 | 35.6 |
Leucine | 7.2 | 1.20 | 107 | 1.20 | 126 | 1.00 | 110 | 0.98 | 109 |
Lysine | 6.6 | 1.12 | 100 | 0.95 | 100 | 0.91 | 100 | 0.90 | 100 |
Methionine | 1.98† | 0.55 | 49.1 | 0.35 | 36.8 | 0.35 | 38.5 | 0.325 | 36.1 |
Phenylalanine | 4.25 | 0.68 | 60.7 | 0.50 | 52.6 | 0.50 | 55.0 | 0.50 | 55.6 |
Proline | --- | 1.00 | 89.3 | 0.20 | 21.1 | 0.40 | 44.0 | 0.40 | 44.4 |
Threonine | 4.4 | 0.65 | 58.0 | 0.65 | 68.4 | 0.65 | 71.4 | 0.60 | 66.7 |
Tryptophan | 0.98 | 0.23 | 20.5 | 0.15 | 15.8 | 0.15 | 16.5 | 0.145 | 16.1 |
Tyrosine | --- | 0.63 | 56.3 | 0.45 | 47.4 | 0.45 | 49.5 | 0.45 | 50.0 |
Valine | 5.0 | 0.82 | 73.2 | 0.82 | 86.3 | 0.69 | 75.8 | 0.69 | 76.7 |
Glutamic acid4 | --- | 12.0 | 1071 | 10.0 | 1053 | 12.0 | 1319 | 12.0 | 1333 |
Total amino acids | 23.0 | 18.7 | 19.9 | 19.8 | |||||
Total nitrogen | 2.83 | 2.33 | 2.37 | 2.35 |