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Table 3 Amino acid compositions of protein sources

From: Leucine content of dietary proteins is a determinant of postprandial skeletal muscle protein synthesis in adult rats

Amino Acid

Vital Wheat Gluten1

Soy Protein Isolate2g/100 g Protein

Egg White Solids3

Whey Protein Isolate4

Alanine

3.1

4.0

6.1

4.9

Arginine

4.7

7.5

5.8

2.4

Aspartate

4.0

11.5

10.3

10.6

Cysteine

1.9

1.3

4.4

2.5

Glutamate + Glutamine

31.7

19.2

13.1

16.9

Glycine

3.8

4.1

3.5

1.8

Histidine

1.8

2.5

2.3

2.0

Isoleucine

3.0

4.8

5.3

6.2

Leucine

6.8

8.0

8.8

10.9

Lysine5

2.8 (+6.3)

6.3

6.5

9.1

Methionine

1.9

1.3

3.8

2.0

Phenylalanine

4.4

5.2

5.9

3.3

Proline

9.4

5.2

3.8

5.6

Serine

3.9

5.4

6.9

4.7

Threonine

2.6

3.8

4.5

6.4

Tryptophan

1.3

1.2

1.6

1.7

Tyrosine

2.4

4.8

4.0

3.0

Valine

4.5

4.7

6.8

6.0

  1. 1Vital Wheat Gluten purchased from Honeyville Grain, Honeyville, UT. 83.4% protein, 7.6% carbohydrate, 9% other (w/w).
  2. 2Soy Protein Isolate provided by Archer Daniels Midland Company, Decatur, IL. 91.6% protein, 1.4% carbohydrate, 7% other.
  3. 3Egg White Solids purchased from Harlan-Teklad, Madison, WI. 87.8% Protein, 4.5% carbohydrate, 7.7% other.
  4. 4Whey Protein provided by Perham, Perham, MN. 89.9% protein, 3.8% carbohydrate, 6.3% other.
  5. 5Wheat Gluten supplemented with 6.3 g L-lysine/100 g protein to match Whey Protein Isolate.
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Nutrition & Metabolism

ISSN: 1743-7075

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