Table 1.
Amino acid composition (g/100 g protein) of mussel byssus and pepsin-soluble collagen (PSC) extracted from mussel byssus
| Mussel byssus | Enzyme-aided extraction conditionsa | ||||
|---|---|---|---|---|---|
| 1:50—4 h | 1:50—24 h | 4:50—4 h | 4:50—24 h | ||
| Hyp | 42.9 | 2.2 | 3.0 | 2.2 | 2.8 |
| Asp | 0.7 | 11.2 | 10.6 | 12.3 | 10.9 |
| Thr | 3.3 | 3.9 | 3.8 | 3.7 | 3.5 |
| Ser | 4.6 | 5.3 | 5.4 | 5.3 | 5.3 |
| Glu | 1.6 | 9.4 | 7.2 | 9.0 | 9.5 |
| Pro | 6.8 | 6.0 | 6.3 | 5.9 | 5.9 |
| Gly | 14.3 | 9.0 | 10.2 | 8.9 | 10.0 |
| Ala | 3.9 | 4.4 | 4.8 | 4.5 | 4.8 |
| Cys | 0.0 | 7.5 | 6.0 | 7.5 | 5.4 |
| Val | 3.0 | 4.5 | 4.4 | 4.6 | 4.2 |
| Met | 0.7 | 1.5 | 5.4 | 1.5 | 5.2 |
| Ile | 2.6 | 3.9 | 3.8 | 3.8 | 3.6 |
| Leu | 1.1 | 5.7 | 5.6 | 5.7 | 5.5 |
| Tyr | 2.5 | 3.6 | 3.2 | 3.6 | 3.0 |
| Phe | 1.9 | 3.0 | 3.0 | 2.9 | 2.9 |
| Lys | 1.7 | 7.1 | 6.2 | 6.9 | 6.4 |
| His | 2.7 | 2.0 | 1.9 | 2.1 | 2.1 |
| Arg | 5.8 | 9.8 | 9.2 | 9.7 | 9.0 |
| Imino acids | 49.7 | 8.2 | 9.3 | 8.1 | 8.7 |
Bold values correspond to imino acids
aConditions of hydrolysis: pepsin:byssus mass ratio and hydrolysis time