Table 5 Concentrations of total amino acids (free plus peptide-bound) in the mature milk of cats, dogs, cows, goats, and pigs

Water, g/kg milk

773

790

877

870

799

Dry matter, g/kg milk

227

210

123

130

201

Crude protein, g/kg milk

75

75

33

35

48

 Ala

2.50

2.80 ± 0.5

1.08 ± 0.03

1.18

1.97 ± 0.06

 Arg

2.93

4.85 ± 0.5

1.14 ± 0.03

1.36

1.43 ± 0.08

 Asp + Asn

9.53

6.51 ± 2.0

2.35 ± 0.17

2.51

5.12 ± 0.12

 Cys

2.48

0.91 ± 0.5

0.30 ± 0.03

0.31

0.72 ± 0.05

 Glu + Gln

8.90

15.8 ± 0.5

6.99 ± 0.07

6.95

9.44 ± 0.37

 Gly

1.56

0.76 ± 0.5

0.61 ± 0.03

0.56

1.12 ± 0.07

 His

1.35

2.04 ± 0.5

0.81 ± 0.03

1.23

0.92 ± 0.05

 4-Hydroxyproline

–

–

0.48 ± 0.04^f

–

0.82 ± 0.04

 Ile

1.97

3.26 ± 0.5

1.58 ± 0.03

1.61

2.28 ± 0.10

 Leu

5.48

8.93 ± 0.5

3.33 ± 0.03

3.41

4.46 ± 0.17

 Lys

3.17

4.32 ± 0.5

2.89 ± 0.07

3.43

4.08 ± 0.15

 Met

1.41

2.42 ± 0.5

0.87 ± 0.03

0.78

1.04 ± 0.04

 Phe

3.53

2.27 ± 0.5

1.68 ± 0.03

1.76

2.03 ± 0.11

 Pro

3.62

7.12 ± 1.0

3.36 ± 0.13

3.11

5.59 ± 0.26

 Ser

3.26

3.33 ± 0.5

1.88 ± 0.03

1.53

2.35 ± 0.11

 Thr

3.44

3.48 ± 0.5

1.41 ± 0.03

1.39

2.29 ± 0.14

 Trp

0.26

–

0.43 ± 0.02^e

–

0.66 ± 0.02

 Tyr

3.57

3.41 ± 0.5

1.58 ± 0.03

1.63

1.94 ± 0.05

 Val

3.80

3.56 ± 0.5

1.75 ± 0.03

2.10

2.54 ± 0.09

 Taurine

0.33 ± 0.14^d

0.36 ± 0.04^d

0.007 ± 0.001^f

0.098^e

0.19 ± 0.013^f