Table 1.
Amino acid composition of gelatin (STB-G) and Type I collagen (STB-C) from the bones of skipjack tuna (residues/1000 residues).
| Amino Acid | STB-G | STB-C |
|---|---|---|
| Hydroxyproline (Hyp) | 72.5 | 73.8 |
| Glutamic acid (Glu) | 64.7 | 66.7 |
| Aspartic acid (Asp) | 46.1 | 46.8 |
| Threonine (Thr) | 25.6 | 25.2 |
| Serine (Ser) | 36.4 | 33.3 |
| Proline (Pro) | 104.8 | 104.4 |
| Glycine (Gly) | 340.3 | 339.1 |
| Alanine (Ala) | 125.3 | 126.3 |
| Cysteine (Cys) | ND | ND |
| Valine (Val) | 25.4 | 26.0 |
| Methionine (Met) | 14.7 | 14.5 |
| Isoleucine (Ile) | 11.4 | 12.7 |
| Leucine (Leu) | 25.2 | 26.0 |
| Tyrosine (Tyr) | 4.3 | 2.9 |
| Phenylalanine (Phe) | 13.8 | 14.3 |
| Hydroxylysine (Hyl) | 5.6 | 4.9 |
| Lysine (Lys) | 29.2 | 29.5 |
| Histidine (His) | 5.5 | 5.3 |
| Arginine (Arg) | 49.2 | 48.3 |
| Total | 1000.0 | 1000.0 |
| Imino acid (Pro + Hyp) | 177.3 | 178.2 |
ND = not detected.