Table 3.
Protein content (%) and amino acid compositions (µg/g DW) of the Red Sea halophytes.
| Amino acids (AAs) * | A. ehrenbergii | S. aegyptiaca | S. monoica | Z. album |
|---|---|---|---|---|
| Total protein | 6.33 | 7.6 | 8.28 | 5.72 |
| Essential amino acids (EAA) | ||||
| Histidine | 2.59 | 3.77 | 2.56 | 1.05 |
| Leucine | 47.92 | 44.75 | 51.95 | 32.61 |
| Iso-leucine | 15.75 | 15.08 | 15.18 | 20.69 |
| Lysine | 24.96 | 33.83 | 34.66 | 19.82 |
| Methionine | 39.15 | 28.25 | 30.65 | 29.62 |
| Phenylalanine | 77.13 | 55.29 | 59.08 | 64.41 |
| Valine | 17.02 | 14.25 | 14.73 | 17.65 |
| Threonine | 6.16 | 9.58 | 6.09 | 4.71 |
| Non-essential amino acids (Non-EAA) | ||||
| Alanine | 17.7 | 20.04 | 14.08 | 12.93 |
| Arginine | 28.65 | 16.32 | 16.62 | 55.94 |
| Aspartic acid | 94.81 | 180.64 | 274.59 | 146.08 |
| Glutamic acid | 448.13 | 702.98 | 612.18 | 818.07 |
| Glycine | 25.88 | 22.34 | 23.14 | 17.41 |
| Proline | 23.35 | 39.66 | 28.74 | 21.56 |
| Serine | 17.75 | 16.95 | 28.3 | 16.42 |
| Tyrosine | 14.11 | 20.72 | 16.73 | 19.93 |
| ∑AAs | 901.06 | 1224.45 | 1229.28 | 1298.9 |
| ∑EAA | 230.68 | 204.8 | 214.9 | 190.56 |
| ∑Non-EAA | 670.38 | 1019.65 | 1014.38 | 1108.34 |
| Ratio EAA/non-EAA | 0.344 | 0.201 | 0.219 | 0.172 |
| EAA/total AAs (%) | 25.5 | 16.7 | 17.5 | 14.7 |
* Tryptophan has not been measured; means (n = 2).