Table 1.
Percent amino composition of shrimp protein hydrolysates obtained from Alcalase 2.4 L and Protamex with different DHs
| Amino acids | A10a | A20b | P10c | P20d |
|---|---|---|---|---|
| Aspartic acid | 11.18 | 11.76 | 11.43 | 11.71 |
| Glutamic acid | 14.78 | 14.99 | 15.44 | 15.15 |
| Serine | 3.75 | 3.85 | 3.69 | 3.79 |
| Glycine | 8.20 | 7.74 | 8.57 | 8.40 |
| Histidine | 2.22 | 2.08 | 2.23 | 2.15 |
| Arginine | 10.19 | 9.84 | 10.18 | 9.94 |
| Threonine | 3.64 | 3.71 | 3.60 | 3.66 |
| Alanine | 5.64 | 5.67 | 5.93 | 5.82 |
| Proline | 7.70 | 6.72 | 7.57 | 7.05 |
| Tyrosine | 2.83 | 2.90 | 2.51 | 2.70 |
| Valine | 4.12 | 4.03 | 3.79 | 3.93 |
| Methionine | 2.32 | 2.38 | 2.23 | 2.33 |
| Cysteine | 1.06 | 1.06 | 0.94 | 1.08 |
| Isoleucine | 3.73 | 3.95 | 3.42 | 3.57 |
| Leucine | 6.71 | 6.95 | 6.59 | 6.66 |
| Phenylalanine | 3.83 | 4.01 | 3.54 | 3.70 |
| Lysine | 8.11 | 8.37 | 8.34 | 8.36 |
| HAAe | 37.93 | 37.67 | 36.52 | 36.84 |
| PCAAf | 20.52 | 20.29 | 20.75 | 20.46 |
| NCAAg | 25.96 | 26.74 | 26.88 | 26.85 |
| TEAAh | 34.68 | 35.47 | 33.73 | 34.36 |
aA10: Shrimp hydrolysate by Alcalase DH 10%
bA20: Shrimp hydrolysate by Alcalase DH 20%
cP10: Shrimp hydrolysate by Protamex DH 10%
dP10: Shrimp hydrolysate by Protamex DH 20%
eHydrophobic amino acids (HAA): Alanine, Proline, Tyrosine, Valine, Methionine, Cysteine, Isoleucine, Leucine and Phenylalanine
fPositively charged amino acids (PCAA): Histidine, Arginine and Lysine
gNegatively charged amino acids (NCAA): aspartic acid and glutamic acid. Aromatic amino acids
hTotal essential amino acids: (TEAA): Histidine, Threonine, Valine, Methionine, Cysteine, Isoleucine, Leucine, Phenylalanine, Lysine