Table 2.
Essential amino acid composition of the different SCP sources and egg white as reference as weight percentage of total amino acids.
| Amino acids | Eggc | Microalgaea | Fungib | PPBc |
|---|---|---|---|---|
| Lysine | 5.5–6.1 | 5.1–6.3 | 4.1–8.5 | 5.6–6.0 |
| Threonine | 2.9–4.3 | 4.0–5.9 | 2.2–3.4 | 2.9–4.3 |
| Methionine | 3.0 | 1.4–3.2 | 0.4–1.4 | 3.0 |
| Cysteine | 2.4b | 0.38–0.65 | 0.9b | NA |
| Tryptophan | 1.6b | 0.86–1.6 | Trace | NA |
| Isoleucine | 3.1–4.3 | 3.4–5.8 | 0.5–3.8 | 3.1–4.3 |
| Leucine | 7.4–7.9 | 7.2–9.0 | 1.4–4.9 | 7.5–7.9 |
| Valine | 6.5–7.0 | 5.7–6.7 | 1.2–5.4 | 6.4–7.0 |
| Phenylalanine | 4.3–4.6 | 5.4–7.1 | 0.6–2.3 | 4.4–4.6 |
Sources: aBacillariophyceae, Chlorophyceae, and Cryptophyceae (Brown, 1991); bA. niger, F. oxysporum, F. moniliforme, C. tropicalis (Christias et al., 1975); cRps. Gelatinosa (Shipman et al., 1975).