Fish and seafood products, have a high nutritional value regarding beneficial amounts of protein, lipids as well as essential micronutrients.
Aquatic animal foods are a rich source of protein and currently supplies 17% of all the protein consumed in the world. Fish is also a good source of easily digestible protein, and its amino acid profile usually contains most of the essential amino acids which is required to humans for balanced diet.
A 100 g cooked serving of most types of fish and shellfish provides approximately 18–20 g of protein, or about a third of the average daily recommended protein intake.
The amount of protein in fish muscle is usually between 16 and 21 %, but values lower than 16 % or as high as 28 % are occasionally found in some species. Proteins are important for growth and development of the body, maintenance and repairing of worn out tissues. Fish is known to be a source of protein rich in essential amino acids (lysine, methionine, cystine, threonine, and tryptophan). Eighteen amino acids were identified in tuna species, and glutamic acid was the most predominant.
Aquatic animal foods have a higher protein content than most terrestrial meats. In addition, aquatic protein is highly digestible and rich in several peptides and essential amino acids that are limited in terrestrial meat proteins, as for example methionine and lysine.
In addition to the high nutritional value, fish proteins also have good functional properties such as water-holding capacity, gelling, emulsification, and textural properties for the products such as fish mince and surimi, the water-holding capacity and the gelling properties which determine the textural attributes of the products are important quality parameters.
Protein content in fish
Showing posts with label amino acids. Show all posts
Showing posts with label amino acids. Show all posts
Friday, August 7, 2020
Sunday, January 25, 2015
Protein deficiency in human body
Protein is one of the three ‘macronutrients’ (protein, carbohydrates, and fats) that human bodies need in balanced amounts.
Proteins are constantly being turned over in body tissues as old cells die and are replaced by new ones. Approximately 300 g of new protein is made each day in the human body.
The disease syndrome of kwashiorkor first described in 1933 is believed to be due to protein deficiency, but it occurs to varying degrees in conjunction with calorie deficiency. The dramatic clinical picture of kwashiorkor (edema, hypoalbuminemia, and a fatty lover with or without skin and hair changes) represents acute decompensation of a relatively long-standing deficiency state, usually precipitated by infection.
The disease syndrome is variable source the degree in both calorie and protein malnutrition, as well as the nutrients, will influence the biochemical and clinical changes.
The term protein deficiency can be defined as state of relative or absolute deficiency of body proteins or one or more of the essential amino acids. The deficiency can result from a protein-deficient due to other disease and in general can also result from a global deficit of food.
In uncomplicated protein deficiency, for example, protein catabolism should be minimal when total energy is the limiting factor, however, protein catabolism must increase to cover energy needs.
Severe marasmus or choric starvation , is characterized by growth retardation , loss of body fat, and muscle wasting. Studies of mass starvation during World War II and in chronically deprived populations suggest that severe deficits of calories and protein result in decreased fertility, in a deceased in the length and weight of the newborn, and in increased rates of neonatal mortality.
When total caloric intake has been adequate or nearly adequate, as is possible when starchy low protein foods are dietary staples, the symptoms are more toward changes associated with protein deficiency pellagra-type dermatitis, fatty liver, changes in texture and pigmentation of hair, gastro intestinal disturbances and diarrhea with resulting loss of electrolytes.
Proteins are constantly being turned over in body tissues as old cells die and are replaced by new ones. Approximately 300 g of new protein is made each day in the human body.
The disease syndrome of kwashiorkor first described in 1933 is believed to be due to protein deficiency, but it occurs to varying degrees in conjunction with calorie deficiency. The dramatic clinical picture of kwashiorkor (edema, hypoalbuminemia, and a fatty lover with or without skin and hair changes) represents acute decompensation of a relatively long-standing deficiency state, usually precipitated by infection.
The disease syndrome is variable source the degree in both calorie and protein malnutrition, as well as the nutrients, will influence the biochemical and clinical changes.
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| MYOGLOBIN |
The term protein deficiency can be defined as state of relative or absolute deficiency of body proteins or one or more of the essential amino acids. The deficiency can result from a protein-deficient due to other disease and in general can also result from a global deficit of food.
In uncomplicated protein deficiency, for example, protein catabolism should be minimal when total energy is the limiting factor, however, protein catabolism must increase to cover energy needs.
Severe marasmus or choric starvation , is characterized by growth retardation , loss of body fat, and muscle wasting. Studies of mass starvation during World War II and in chronically deprived populations suggest that severe deficits of calories and protein result in decreased fertility, in a deceased in the length and weight of the newborn, and in increased rates of neonatal mortality.
When total caloric intake has been adequate or nearly adequate, as is possible when starchy low protein foods are dietary staples, the symptoms are more toward changes associated with protein deficiency pellagra-type dermatitis, fatty liver, changes in texture and pigmentation of hair, gastro intestinal disturbances and diarrhea with resulting loss of electrolytes.
Protein deficiency in human body
Tuesday, April 16, 2013
Amino acids in human body
Proteins are structurally more complex than carbohydrates and lipids and contain an amino (NH2) group.
They are synthesized in the cell cytoplasm from constituent molecules called amino acids. The amino acids joined together by bonds that are referred to as peptide bonds.
There are at least 20 different amino acids in human body, which all provided from the diet. However, body capable of making 12 amino acids form nitrogen and smaller molecules derived from carbohydrates and fats.
Proteins serve many different functions in the body. Some are enzymes and regulate the rate of chemical reactions; other is important in growth and repair of tissues.
Cell, hormones, muscles, blood and all tissues and fluid except bile and urine require protein. Proteins help to regulate the body’s water balance and maintain the proper internal pH.
It is of great importance, to have good sources of both essential and nonessential amino acids to provide sufficient nitrogen. Proteins in the form of amino acids are the building blocks of the body.
Some amino acids act as neurotransmitters, the chemicals that carry information from one nerve cell to another. Amino acids also enable vitamins and minerals to perform their jobs properly.
Amino acids in human body
They are synthesized in the cell cytoplasm from constituent molecules called amino acids. The amino acids joined together by bonds that are referred to as peptide bonds.
There are at least 20 different amino acids in human body, which all provided from the diet. However, body capable of making 12 amino acids form nitrogen and smaller molecules derived from carbohydrates and fats.
Proteins serve many different functions in the body. Some are enzymes and regulate the rate of chemical reactions; other is important in growth and repair of tissues.
Cell, hormones, muscles, blood and all tissues and fluid except bile and urine require protein. Proteins help to regulate the body’s water balance and maintain the proper internal pH.
It is of great importance, to have good sources of both essential and nonessential amino acids to provide sufficient nitrogen. Proteins in the form of amino acids are the building blocks of the body.
Some amino acids act as neurotransmitters, the chemicals that carry information from one nerve cell to another. Amino acids also enable vitamins and minerals to perform their jobs properly.
Amino acids in human body
Tuesday, March 27, 2012
Methionine
Methionine, is a sulfur containing amino acid that is essential for human and animal nutrition. It is required for DNA-RNA structure, collagen and each cell’s protein syntheses function.
It has relatively low profile and is not present in high concentrations throughout the body.
Methionine is a nonpolar amino acid. Like other hydrophobic amino acids, it can play a role in binding or recognition of hydrophobic ligands such as lipids.
It is the most abundant sulfur containing amino acid and the principal supplier of sulfur to man and animals.
Methionine helps remove heavy metals from the tissues. For example, lead is one heavy metal which causes brain damage.
It helps in the breakdown of fat, thus helping ro prevent a buildup of fat in the liver and arteries that might obstruct blood flow to the brain, heart and kidney.
Methionine high sulfur content helps supply the body with the acidity it needs to stave off chronic disease states that may result when the body’s alkaline to acid is too high.
This amino acid helps the digestive system; helps to detoxify harmful agents such as lead and other heavy metals; helps diminish muscle weakness, prevent brittle hair and protect against radiation and it beneficial for people with osteoporosis or chemical allergies.
It has relatively low profile and is not present in high concentrations throughout the body.
Methionine is a nonpolar amino acid. Like other hydrophobic amino acids, it can play a role in binding or recognition of hydrophobic ligands such as lipids.
It is the most abundant sulfur containing amino acid and the principal supplier of sulfur to man and animals.
Methionine helps remove heavy metals from the tissues. For example, lead is one heavy metal which causes brain damage.
It helps in the breakdown of fat, thus helping ro prevent a buildup of fat in the liver and arteries that might obstruct blood flow to the brain, heart and kidney.
Methionine high sulfur content helps supply the body with the acidity it needs to stave off chronic disease states that may result when the body’s alkaline to acid is too high.
This amino acid helps the digestive system; helps to detoxify harmful agents such as lead and other heavy metals; helps diminish muscle weakness, prevent brittle hair and protect against radiation and it beneficial for people with osteoporosis or chemical allergies.
Methionine
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