Table 2.
Molecular weight distribution of water-soluble peptides
| g/mol | BW-WM protein | BW-HA protein | BW-HP protein |
|---|---|---|---|
| > 20,000 | 29.5 | 0.4 | < LOD |
| 20,000–15,000 | 4.5 | 0.3 | < LOD |
| 15,000–10,000 | 5.1 | 1.2 | 0.4 |
| 10,000–8000 | 2.4 | 1.8 | 0.9 |
| 8000–6000 | 2.1 | 4.0 | 2.2 |
| 6000–4000 | 1.8 | 8.6 | 5.4 |
| 4000–2000 | 1.5 | 18.4 | 15.1 |
| 2000–1000 | 0.8 | 20.2 | 20.1 |
| 1000–500 | 0.7 | 14.9 | 19.3 |
| 500–200 | 6.4 | 12.2 | 17.5 |
| < 200a | 45.3 | 17.8 | 19.2 |
BW-WM blue whiting whole meal, BW-HA blue whiting protein hydrolysate prepared with Alcalase®, BW-HP blue whiting protein hydrolysate prepared with Protamex®, LOD level of detection
aThe peptide fraction with molecular weight < 200 g/mol comprises free amino acids and miscellaneous water-soluble components absorbing light with a wavelength of 214 nm)