Table 1 Amino acid composition of SSC and compared with collagen of brown banded bamboo shark skin [8] and tilapia skin [18] (residues/1000 amino acid residues)
Amino acid | Collagen of blue shark skin | Collagen of brown banded bamboo shark skin | Collagen of Tilapia skin |
|---|---|---|---|
Aspartic acid | 42 | 42 | 41 |
Threonine | 24 | 23 | 24 |
Serine | 41 | 41 | 33 |
Glutamic acid | 76 | 77 | 68 |
Glycine | 330 | 318 | 319 |
Alanine | 118 | 105 | 118 |
Valine | 25 | 25 | 16 |
Cysteine | 0 | 1 | 0 |
Methionine | 11 | 12 | 6 |
Isoleucine | 21 | 18 | 8 |
Leucine | 26 | 24 | 2 |
Tyrosine | 3 | 3 | 2 |
Phenylalanine | 14 | 14 | 27 |
Lysine | 26 | 29 | 24 |
Histidine | 8 | 7 | 5 |
Arginine | 54 | 51 | 52 |
Hydroxyproline | 76 | 93 | 77 |
Proline | 105 | 111 | 113 |
Imino acid (Pro + Hyp) | 181 | 204 | 190 |