Table 2.
Peptide, sum of hydrophobic amino acids (SHA), Taurine (Tau), Homotaurine (Htau), and Gamma-aminobutyric acid (GABA) content in enzymatic protein hydrolysates (EPH) from the 36 algae species studied (mean of n = 3 independent determinations ± SD)
| Peptide | SHA | Tau | Htau | GABA | |
|---|---|---|---|---|---|
| mg Glu eq/mL | g/100 g d.w | ||||
| Red algae | |||||
| Porphyra sp. | 2.32 ± 0.14 | 21.5 ± 2.13 | 0.35 ± 0.02 | 0.06 ± 0.01 | 1.25 ± 0.08 |
| Gigartina pistillata | 2.05 ± 0.13 | 20.7 ± 3.65 | 0.38 ± 0.02 | 0.05 ± 0.00 | 1.14 ± 0.01 |
| Chondrus crispus | 2.11 ± 0.09 | 21.8 ± 1.52 | 0.25 ± 0.01 | 0.04 ± 0.00 | 1.05 ± 0.11 |
| Mastocarpus stellatus | 1.98 ± 0.21 | 20.0 ± 2.54 | 0.14 ± 0.01 | 0.04 ± 0.01 | 0.88 ± 2.74 |
| Palmaria palmata | 1.98 ± 0.21 | 28.4 ± 2.74 | 0.06 ± 0.01 | 0.02 ± 0.01 | 0.35 ± 0.02 |
| Gelidium corneum | 2.58 ± 0.19 | 48.2 ± 2.96 | 0.03 ± 0.01 | 0.01 ± 0.01 | 0.39 ± 0.01 |
| Plocammium Cartilagineum | 2.64 ± 0.11 | 33.0 ± 3.05 | 0.04 ± 0.01 | 0.02 ± 0.01 | 0.29 ± 0.06 |
| Centroceras clavulatum | 2.14 ± 0.10 | 44.9 ± 1.74 | 0.02 ± 0.04 | 0.00 ± 0.01 | 0.19 ± 0.05 |
| Halopithys incurva | 2.81 ± 0.04 | 47.0 ± 2.65 | 0.04 ± 0.01 | 0.02 ± 0.01 | 0.37 ± 0.03 |
| Median | 2.14a | 28.4a | 0.06b | 0.02a | 0.39b |
| Green algae | |||||
| Aphanizomenon flos-aquae | 2.83 ± 0.14 | 26.7 ± 2.52 | 0.24 ± 0.01 | 0.04 ± 0.00 | 1.05 ± 0.08 |
| Caulerpa lentillifera | 2.28 ± 0.10 | 28.7 ± 2.74 | 0.39 ± 0.02 | 0.06 ± 0.00 | 1.28 ± 0.09 |
| Codium sp. | 1.84 ± 0.05 | 9.90 ± 2.04 | 0.38 ± 0.01 | 0.06 ± 0.00 | 1.27 ± 0.05 |
| Dunaliella salina | 2.13 ± 0.06 | 21.5 ± 3.12 | 0.35 ± 0.00 | 0.04 ± 0.00 | 0.91 ± 0 .03 |
| Arthrospira platensis | 2.60 ± 0.04 | 26.6 ± 3.63 | 0.35 ± 0.03 | 0.05 ± 0.00 | 0.83 ± 0.05 |
| Chlorella vulgaris | 2.87 ± 0.15 | 26.5 ± 3.55 | 0.31 ± 0.00 | 0.04 ± 0.00 | 0.94 ± 1.05 |
| Tetraselmis chui | 1.62 ± 0.17 | 13.1 ± 2.55 | 0.25 ± 0.05 | 0.05 ± 0.00 | 0.63 ± 0.20 |
| Auxenochlorella pyrenoidosa | 2.43 ± 0.09 | 26.8 ± 2.74 | 0.27 ± 0.00 | 0.04 ± 0.00 | 0.72 ± 0.92 |
| Ulva lactuca | 2.38 ± 0.17 | 14.9 ± 1.85 | 0.03 ± 0.00 | 0.02 ± 0.00 | 0.37 ± 0.03 |
| Ulva intestinalis | 2.81 ± 0.13 | 45.5 ± 1.96 | 0.26 ± 0.01 | 0.05 ± 0.01 | 0.82 ± 0.01 |
| Codium decorticatum | 1.67 ± 0.15 | 16.9 ± 1.47 | 0.00 ± 0.00 | 0.01 ± 0.00 | 0.18 ± 001 |
| Median | 2.38a | 21.5a | 0.27a | 0.04a | 0.88a |
| Brown algae | |||||
| Ascophyllum nodosum | 1.51 ± 0.04 | 4.70 ± 0.05 | 0.19 ± 0.00 | 0.05 ± 0.00 | 0.68 ± 0.02 |
| Sargassum fusiforme | 1.70 ± 0.14 | 5.00 ± 0.55 | 0.25 ± 0.00 | 0.04 ± 0.00 | 0.72 ± 0.01 |
| Eisenia bicyclis | 1.86 ± 0.16 | 6.60 ± 0.41 | 0.23 ± 0.00 | 0.03 ± 0.00 | 0.74 ± 0.00 |
| Laminaria ochroleuca | 2.19 ± 0.18 | 27.2 ± 3.52 | 0.25 ± 0.01 | 0.05 ± 0.00 | 0.85 ± 0.01 |
| Himanthalia elongata | 1.69 ± 0.25 | 9.00 ± 1.55 | 0.23 ± 0.01 | 0.05 ± 0.00 | 0.65 ± 0.06 |
| Undaria pinnatifida | 1.73 ± 0.16 | 14.4 ± 1.47 | 0.19 ± 0.05 | 0.04 ± 0.00 | 0.64 ± 0.08 |
| Odontella aurita | 1.80 ± 0.08 | 27.2 ± 1.98 | 0.19 ± 0.01 | 0.04 ± 0.00 | 1.12 ± 0.13 |
| Fucus vesiculosus | 1.83 ± 0.27 | 18.6 ± 1.85 | 0.21 ± 0.01 | 0.03 ± 0.00 | 0.51 ± 0.03 |
| Bifurcaria bifurcata | 2.12 ± 0.20 | 31.3 ± 3.74 | 0.00 ± 0.00 | 0.01 ± 0.00 | 0.00 ± 0.00 |
| Fucus guiryi | 1.62 ± 0.05 | 4.60 ± 3.14 | 0.12 ± 0.00 | 0.01 ± 0.00 | 0.27 ± 0.02 |
| Pelvetia canaliculata | 1.72 ± 0.14 | 5.50 ± 3.85 | 0.07 ± 0.00 | 0.02 ± 0.00 | 0.09 ± 0.01 |
| Halopteris scoparia | 1.82 ± 0.10 | 4.60 ± 2.52 | 0.04 ± 0.00 | 0.01 ± 0.00 | 0.25 ± 0.12 |
| Gongolaria baccata | 1.88 ± 0.16 | 4.61 ± 2.15 | 0.06 ± 0.00 | 0.02 ± 0.00 | 0.11 ± 0.10 |
| Cladostephus spongiosus | 2.01 ± 0.18 | 9.81 ± 2.19 | 0.05 ± 0.00 | 0.01 ± 0.00 | 0.11 ± 0.01 |
| Ericaria selaginoides | 1.55 ± 0.21 | 5.42 ± 1.14 | 0.06 ± 0.01 | 0.02 ± 0.00 | 0.39 ± 0.01 |
| Nannochloropsis sp. | 2.22 ± 0.27 | 27.1 ± 1.11 | 0.15 ± 0.06 | 0.03 ± 0.00 | 0.49 ± 0.05 |
| Median | 1.83b | 5.50b | 0.17a | 0.03a | 0.50b |
Significant values are in bold.
Different small letters in the same column indicate significant differences between medians of the algae groups (p < 0.05).