Determination of the amino acid composition of fish raw materials is important
for characterizing food and biological value. The results of our studies are given in
Table 5.
Table 5 Amino acid composition of proteins of fish raw materials,
mg per 100 g of the product
Amino acid
Silver carp
Amino acid
Silver carp
Essential amino acids
8656
Alanine
1256
Valine
1250
Arginine
993
Isoleucine
1093
Histidine
814
Leucine
1675
Prolinserin
496
Lysine
2097
glutamic acid
957
Methionine
remains
aspartic acid
3309
Threonine
1020
Glycine
2741
Phenylalanine
910
Cysteine
1073
Tryptophan
remains
Tyrosine
remains
nonessential amino acids
11639
Valine
611
According to the data, the content of essential and nonessential amino acids in
silver carp flesh differs from the literature data, which may be due to different growing
conditions and the physiological state of the fish.
An important indicator of the biological value of proteins is the correspondence
of the content of essential amino acids to an ideal protein (Table 6).
The data of Table 6 indicate that the amount of essential amino acids in the silver
carp flesh protein exceeds their amount in the ideal protein. However, the content of
methionine + cystine and tryptophan is lower than in the “ideal” protein, so these amino
acids are limiting. However, there is a large content of valine, leucine, lysine,
phenylalanine + tyrosine, isoleucine and threonine, which are quite important for the
human body.
Table 6 Assessment of the correspondence of the amino acid composition of fish
raw material proteins to an ideal protein to the FAO/WHO scale, g/100 g of protein
Amino acid
Raw material
Ideal protein acc. to FAO/WHO
Silver carp
Valine
7.669
5.00
Isoleucine
6.705
4.00
Leucine
10.276
7.50
Methionine + Cystine
remains
3.50
Threonine
6.258
4.00
Phenylalanine + Tyrosine
9.331
6.00
Tryptophan
remains
1.00
Lysine
12.865
5.50
Total
53.104
36.5
For the purpose of complex study and evaluation of fish raw materials, its mineral
composition was studied (Table 7).
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