1、Amino Acid Compositions of 27 Food Fishes and Their Importance in

Fish is an important dietary source of quality animal proteins and amino acids and play important role in human nutrition. In the present investigation, crude protein content and amino acid compositions of important food fishes from different habitats have been studied.

2、Amino Acids and Proteins

Fish, like other animals, do not have a true protein requirement but have a requirement for a well-balanced mixture of essential or indispensable and nonessential or dispensable amino acids. Size and age, water temperature, and maintenance requirements affect the protein requirements of fishes.

3、Nutrition and Functions of Amino Acids in Fish

There is compelling evidence that an adequate supply of both traditionally classified nutritionally essential amino acids (EAAs) and non-essential amino acids (NEAAs) in diets improve the growth, development and production performance of aquatic animals (e.g., larval metamorphosis).

4、Amino acids of fish and shellfishes and importance of essential amino acids

Amino acids Although over 100 different amino acids have been isolated from biological materials, only 25 of these are commonly found in proteins. Individual amino acids are characterised by having an acidic carboxy group (COOH) and a basic nitrogenous group (NH2).

Fish Protein and Its Derivatives: Functionality, Biotechnology and

intake for the global population and 6.7 percent of all protein sources in 2013. Fish has easily digestible high-quality proteins with essential amino acids and also includes fatty acids (i.e., omega-3 fatty acids) and essential vitamins and mineral.

Fish Proteins: Structure, Types, and Nutritional Value

Fish proteins are rich in essential amino acids such as lysine, methionine, and tryptophan. These amino acids are crucial for various bodily functions, including growth, tissue repair, and enzyme production.

Muscle Protein Hydrolysates and Amino Acid Composition in Fish

Fish proteins are easily digested and abundant in essential amino acids that are limited in terrestrial meat proteins such as methionine and lysine (6.5% vs. 5.7% and 19.6% vs. 19.0% of total essential amino acids in fish vs. terrestrial meat, respectively) [1].

Fish Protein

Fish proteins, with only slight differences among groups, possess a high nutritive value, similar to that of meat proteins and slightly lower than that of egg. It is worth pointing out the elevated supply, relative to meat, of essential amino acids such as lysine, methionine, and threonine.

Amino Acid Compositions of 27 Food Fishes and Their Importance in

In the present investigation, crude protein content and amino acid compositions of important food fishes from different habitats have been studied.

Chemical Composition of Fish and Fishery Products

Fish is the only protein source that contains all the essential amino acids. Lipids and proteins are the major components of fish food; meanwhile carbohydrates are usually detected at very low levels (<0.5 %).

Fish protein is an important source of protein, containing a variety of amino acid elements. The following are some common amino acid elements:

1. Lysine: This is the amino acid with the highest content in fish protein, playing an important role in the human body. Lysine can participate in many biochemical reactions, including protein synthesis and metabolism. Additionally, lysine helps maintain normal nerve function and muscle contraction.

2. Arginine: Arginine is also an important amino acid that can be converted into ornithine in the human body, then transported to the liver for metabolism. Arginine plays a significant role in maintaining heart health, stable blood pressure, and immune function.

3. Histidine: Histidine is another important amino acid that aids the body in manufacturing other amino acids, such as tryptophan. histidine helps regulate blood pressure and glucose levels.

4. Methionine: Methionine is an essential amino acid because it cannot be synthesized by the human body. In the human body, methionine can be converted into cysteine and homocysteine, both of which are precursors to other amino acids. Furthermore, methionine participates in the synthesis of thyroid hormones.

5. Asparagine: Asparagine is another important amino acid that can be converted into glutamine. Glutamine has multiple functions in the human body, including involvement in energy metabolism and maintaining intracellular environment stability.

6. Leucine: Leucine is an essential amino acid as it cannot be synthesized by the human body. Leucine can be converted into phenylalanine and tyrosine in the human body, both of which serve as precursors to other amino acids. Additionally, leucine helps regulate blood sugar and cholesterol levels.

7. Isoleucine: Isoleucine is an essential amino acid because it cannot be synthesized by the human body. Isoleucine can be converted into phenylalanine and tyrosine in the human body, serving as precursors to other amino acids. Furthermore, isoleucine aids in regulating blood sugar and cholesterol levels.

8. Proline: Proline is a non-essential amino acid but can be converted into other amino acids, such as lysine and hydroxyproline, in the human body. These amino acids have various functions, including participating in protein structure and function.

9. Hydroxyproline: Hydroxyproline is a non-essential amino acid but can be converted into other amino acids, such as lysine and hydroxyproline, in the human body. These amino acids have multiple roles, including involvement in protein structure and function.

10. Glycine: Glycine is a non-essential amino acid but can be converted into other amino acids, such as lysine and hydroxyproline, in the human body. These amino acids play various roles, including participation in protein structure and function.

In addition to the amino acids mentioned above, fish protein also contains other amino acids, such as serine, threonine, tyrosine, and tryptophan. These amino acids all play important roles in the human body, such as participating in energy metabolism, immune responses, and neurotransmission.

fish protein is a high-quality protein source rich in various amino acid elements. In our daily diet, we should consume fish protein in moderation to obtain sufficient amino acids to support the normal functions of the body. we should also pay attention to dietary diversity to ensure comprehensive nutrition.