Microbial Reclamation of Fish Industry By-products 265
Table 10.6 Amino acid composition of protein hydrolysates obtained from processing wastes of different fi sh species
Pacifi c whiting (A) Alaska Pollack (B)
Squid (C) Fish soluble (D) Salmon (E) Catla (F)
Shrimp (G)
Essential Amino acids
Histidine
2.10
0.00
1.45
2.06
1.67
2.06
2.40
Isoleucine
4.30
1.01
3.87
0.35
4.00
3.60
5.75
Leucine
7.16
1.98
7.47
0.77
7.67
7.17
9.84
Lysine
8.33
1.55
0.66
0.54
7.67
7.07
8.19
Methionine
3.02
1.72
3.32
0.48
3.00
2.02
3.13
Phenyl alanine
3.80
2.05
3.73
0.64
3.67
3.53
4.55
Tyrosine
3.50
0.00
3.11
0.40
7.00
*
2.57
0.54
Threonine
5.12
2.45
2.97
0.74
3.67
4.02
2.58
Tryptophan
0.14
-
-
-
1.33
-
-
Arginine
7.29
6.38
10.02
2.76
6.33
10.82
5.93
Valine
4.72
1.90
4.08
0.56
5.00
4.79
7.42
Non Essential Amino acids
Aspargine/Aspartate
10.10
3.05
9.46
0.67
-
8.50
5.48
Glutamine/Glutamate
13.80
5.13
12.63
1.52
-
15.01
11.26
Serine
5.33
5.78
4.01
0.67
-
4.34
1.99
Glycine
7.88
41.47
4.01
2.98
-
10.99
8.35
Alanine
6.53
9.47
4.96
1.33
-
7.04
18.47
Proline/Hydroxy proline
6.00
9.73
4.29
1.45
-
6.24
4.05
Cysteine/cystine
0.92
-
0.49
0.05
-
0.23
0.09
*: Tyrosine + Phenylalanine; A : Benjakul and Morrissey, 1997; B–Kim et al., 2001; C–Lian et al., 2005; D–Nilsang et al., 2005; E–Wright, 2004;
F–Bhaskar et al., 2008; G–Bhaskar et al., 2010.