Amino acid

mg/g of feather (present work)

Steam hydrolyzed mg/g feather (Eggum, 1970)

acid hydrolyzed mg/g feather (Eggum, 1970)

mg amino acid/g CP (present work)

mg amino acid/g CP (Grazziotin et al., 2006)

Aspartic acid

51

-

-

55.85

57.8

Glutamic acid

56.1

-

-

61.45

92.2

Serine

73.8

-

-

80.85

108.3

Histidine

65.9

7.2

6.3

72.15

9.3

Glycine

51.05

-

-

55.9

59.6

Threonine

50.9

4.84

4.87

55.75

36.6

Alanine

46.3

-

-

50.7

54.2

Arginine

32.85

2.08

2.3

35.95

84.3

Tyrosine

37.85

2.8

3.11

41.45

32.9

Valine

33.15

7.25

7.73

36.3

85.6

Methionine

31.6

.72

0.76

34.6

17.0

Phenyl alanine

69.95

4.61

4.85

76.6

54.2

Isoleucine

51.85

4.82

5.55

56.8

62.8

Leucine

17.15

8.25

8.27

18.75

66.9

Lysine

14.85

2.08

2.23

16.25

24.1