Table 12.
Relative content of amino acids in chicken feathers (adapted from [150]).
|
Functional group |
Amino acid |
wt.% |
||
|---|---|---|---|---|
|
Positively charged |
Arginine |
4.3 |
6.57 |
6.16 |
|
Negatively charged |
Aspartic acid |
6 |
4.76 |
– |
|
Glutamic acid |
– |
9.18 |
8.76 |
|
|
Glutamine |
7.6 |
– |
– |
|
|
Hydrophobic |
Tyrosine |
– |
– |
2.43 |
|
Leucine |
2.62 |
7.48 |
7.38 |
|
|
Isoleucine |
3.32 |
4.93 |
4.28 |
|
|
Valine |
1.6 |
7.2 |
6.1 |
|
|
Glycine |
– |
7.57 |
6.31 |
|
|
Cysteine |
– |
– |
7.16 |
|
|
Alanine |
3.4 |
3.6 |
4 |
|
|
Phenylalanine |
0.86 |
4.11 |
4.4 |
|
|
Methionine |
1.02 |
0.03 |
0.025 |
|
|
Lysine |
– |
0.57 |
1.1 |
|
|
Histidine |
– |
0.02 |
0.4 |
|
|
Hygroscopic |
Threonine |
4 |
4.11 |
3.76 |
|
Serine |
16 |
13.57 |
8.92 |
|
|
Special |
Proline |
12 |
1.01 |
8.84 |
|
Asparagine |
4 |
– |
5.23 |
|
|
Tryptophan |
1 |
1.85 |
0.97 |
|
|
Reference |
|
[151] |
[154] |
[155] |