Table 2 Analyzed and calculated concentration of nitrogen, total and free amino acids in high crude protein (HCP) and low crude protein (LCP) diets^a (g/kg, as-fed basis)

 Dry matter

887.6

–

889.5

–

 Nitrogen

30.0

30.8

22.0

22.4

 Arginine

12.3

12.6

7.5

7.8

 Histidine

4.9

5.3

3.9

4.3

 Isoleucine

8.5

8.1

6.1

6.0

 Leucine

16.5

16.7

11.4

11.9

 Lysine

11.1

10.4

10.8

10.1

 Methionine

2.7

3.1

2.7

3.3

 Methionine + cysteine

5.6

6.3

4.8

5.7

 Phenylalanine

9.8

9.6

7.5

7.6

 Phenylalanine + tyrosine

16.0

15.9

11.9

12.0

 Threonine

7.2

7.3

6.4

6.8

 Tryptophan

2.5

2.3

1.8

1.9

 Valine

9.4

9.0

8.9

8.9

 Arginine

0.3

–

0.1

–

 Histidine

–

–

0.7

0.7

 Isoleucine

0.1

–

0.8

0.8

 Leucine

0.1

–

0.1

–

 Lysine

0.2

–

3.6

3.7

 Methionine^c

–

–

0.7

1.1

 Methionine + cysteine

–

–

0.7

1.1

 Phenylalanine

–

–

1.2

1.3

 Phenylalanine + tyrosine

0.1

–

1.2

1.3

 Threonine

0.2

–

2.0

2.0

 Tryptophan^d

–

–

–

0.5

 Valine

–

–

2.7

2.9