Table 3 Composition of proteins in mature milk of mammals

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