Table 3.
Composition of proteins in mature milk of mammals
| Protein | Cow | Pig | Sheep | Goat | Horse | Human |
|---|---|---|---|---|---|---|
| g/L milk | ||||||
| Caseins | 28 | 28 | 46 | 29 | 13.6 | 4.4 |
| α-S1 | 10.6 | 20 | 16.6 | 4.3 | 2.4 | 0.52 |
| α-S2 | 3.4 | 2.4 | 6.4 | 5.8 | 0.2 | 0.0 |
| β | 10.1 | 2.3 | 18.3 | 11.2 | 10.7 | 2.8 |
| κ | 3.9 | 3.3 | 4.5 | 7.7 | 0.24 | 1.0 |
| Whey proteins | 6.0 | 20 | 10 | 5.0 | 8.3 | 6.6 |
| α-Lactalbumin | 1.2 | 3.0 | 2.4 | 0.85 | 2.4 | 2.8 |
| β-Lactoglobulin | 3.2 | 9.5 | 6.4 | 2.3 | 2.6 | 0.0 |
| Lactoferrin | 0.02–0.2 | 0.1–0.25 | 0.1 | 0.02–0.2 | 0.58 | 3–4 |
| Transferiin | 0.02–0.2 | 0.02–0.2 | 0.1 | 0.02–0.2 | 0.1 | 0.02–0.03 |
| Immunoglobulins | 1.1 | 6.6 | 0.4 | 0.4 | 1.6 | 1.2 |
| Serum albumin | 0.4 | 0.5 | 0.5 | 0.6 | 0.4 | 0.5 |