Table 3.
Total amino acids in the fractions obtained from processing of blue mussels.
| Amino acid A | Centrifugation aqueous phase | 50-kDa ultra-filtration |
1-kDa ultra-filtration |
Nano-filtration |
|---|---|---|---|---|
| Essential | ||||
| Histidine | 0.79 ± 0.04 | 1.09 ± 0.04 | 0.91 ± 0.07 | 1.07 ± 0.18 |
| Isoleucine | 1.30 ± 0.04 | 1.41 ± 0.01 | 1.37 ± 0.13 | 1.82 ± 0.03 |
| Leucine | 1.90 ± 0.16 | 1.99 ± 0.03 | 1.99 ± 0.12 | 2.63 ± 0.00 |
| Lysine | 2.20 ± 0.34 | 2.48 ± 0.11 | 2.68 ± 0.08 | 2.80 ± 0.24 |
| Methionine | 0.65 ± 0.15 | 0.37 ± 0.04 | 0.71 ± 0.04 | 0.79 ± 0.01 |
| Phenylalanine | 0.99 ± 0.09 | 1.18 ± 0.06 | 0.92 ± 0.07 | 1.59 ± 0.33 |
| Threonine | 1.45 ± 0.02 | 2.24 ± 0.07 | 1.78 ± 0.08 | 1.80 ± 0.32 |
| Tryptophan | n.a.C | n.a. C | n.a. C | n.a. C |
| Valine | 1.46 ± 0.05 | 1.75 ± 0.04 | 1.61 ± 0.16 | 1.95 ± 0.03 |
| Total (a) | 10.74 | 12.51 | 11.97 | 14.45 |
| Nonessential | ||||
| Alanine | 2.00 ± 0.12 | 1.94 ± 0.01 | 2.32 ± 0.10 | 2.12 ± 0.11 |
| Arginine | 2.53 ± 0.05 | 2.27 ± 0.10 | 2.80 ± 0.24 | 3.86 ± 0.17 |
| Aspartic acid | 3.59 ± 0.41 | 5.08 ± 0.11 | 5.65 ± 0.08 | 4.04 ± 0.05 |
| Cysteine | 0.38 ± 0.02 | 0.67 ± 0.10 | 0.88 ± 0.13 | 0.25 ± 0.03 |
| Glutamic acid | 4.96 ± 0.32 | 6.81 ± 0.09 | 7.52 ± 0.18 | 5.37 ± 0.08 |
| Glycine | 3.63 ± 0.04 | 5.00 ± 0.17 | 4.21 ± 0.24 | 3.06 ± 0.34 |
| Proline | 1.60 ± 0.01 | 2.95 ± 0.11 | 2.36 ± 0.16 | 1.58 ± 0.07 |
| Serine | 1.51 ± 0.07 | 1.94 ± 0.01 | 1.90 ± 0.04 | 1.67 ± 0.16 |
| Taurine B | 3.39 ± 0.05 | 0.58 ± 0.03 | 1.94 ± 0.07 | 4.27 ± 0.53 |
| Tyrosine | 0.91 ± 0.01 | 0.59 ± 0.03 | 1.10 ± 0.03 | 1.51 ± 0.32 |
| Total (b) | 24.50 | 27.83 | 30.68 | 27.73 |
| Grand total (a + b) | 35.24 | 40.34 | 42.65 | 42.18 |
A Expressed as % (g/100 g) on a dry matter basis. B Taurine is a sulfur-containing amino acid derived from methionine and cysteine. C n.a., not analyzed.