What is the most abundant protein in mammals making up about 25% of their total protein content?
"Collagen Collagen is the main structural protein in the extracellular space in the various connective tissues in the body. As the main component of connective tissue, it is the most abundant protein in mammals, making 25% to 35% of the whole-body protein content. Collagen consists of amino acids wound together to form triple-helices l of elongated fibrils. It is mostly found in fibrous tissues such as tendons, ligaments and skin. Depending upon the degree of mineralization, collagen tissues may be either rigid (bone) or compliant (tendon) or have a gradient from rigid to compliant (cartilage). It is also abundant in"
"protein. The amino acid sequence of KIAA1109 is highly conserved throughout mammals. The protein identity ranges from 93.2% in Opossum to 99.8% in Chimpanzees and protein similarity is no less than 97% in all mammals included. Birds continue to show fairly high conservation with protein identities around 90% and proteins similarities at a high 96%. While conservation is still high the lower numbers may be due to small truncations on either, the 5’ and 3’ ends of these sequences. As we move to the more distant species of zebra fish and then the red four beetle and carpenter ant the"
"in cow's milk is 20% whey protein and 80% casein protein, whereas the protein in human milk is 60% whey and 40% casein. The protein fraction in whey constitutes approximately 10% of the total dry solids in whey. This protein is typically a mixture of beta-lactoglobulin (~65%), alpha-lactalbumin (~25%), bovine serum albumin (~8%)(see also serum albumin), and immunoglobulins. These are soluble in their native forms, independent of pH. The amino acid cysteine in whey protein is a substrate for the synthesis of glutathione in the body which is a ubiquitous cellular antioxidant; laboratory experiments have suggested that whey protein and"
"for ruminants such as cattle, the truth is that many of these meals have undesirable amino acid ratios or exhibit poor digestibility which limits their use in swine and poultry diets. An exception to this trend is soybean meal. It possesses an excellent amino acid profile, a low fibre content, high digestibility, and high crude protein levels ranging from 44 to 50%. These advantages, including soybean meal’s high lysine content of 6.5%, make it a very appropriate protein supplement in poultry and swine as well as ruminant diets. In fact, soybean meal accounts for 63% of the protein feed sources"
"collection of globular proteins isolated from whey. The protein in cow's milk is 20% whey protein and 80% casein protein, whereas the protein in human milk is 60% whey and 40% casein. The protein fraction in whey constitutes approximately 10% of the total dry solids in whey. This protein is typically a mixture of beta-lactoglobulin (~65%), alpha-lactalbumin (~25%), bovine serum albumin (~8%)(see also serum albumin), and immunoglobulins. These are soluble in their native forms, independent of pH. The amino acid cysteine in whey protein is a substrate for the synthesis of glutathione in the body which is a ubiquitous cellular"
"many things like neurotransmitters, enzymes, hormones, and chromosomes. Proteins known as complete proteins contain all eight of the essential amino acids. Meat, cheese, eggs, and yogurt are all examples of complete proteins. Incomplete proteins contain only some of the eight essential amino acids and it is recommended that people consume a combination of these proteins. Examples of incomplete proteins include nuts, seeds, legumes, and grains. When animals are fed a diet deficient in essential amino acids, uncharged tRNAs accumulate in the anterior piriform cortex signaling diet rejection [105]. The body normally interconverts amino acids to maintain homeostasis, but muscle protein"
"of protein in the diet by protein reserves, for example. Higher concentrations of protein in diet have also positively correlated with gamete production across various animals. The formation of oothecae in brown-banded cockroaches based on protein intake was tested. A protein intake of 5% deemed too low as it delayed mating and an extreme of 65% protein directly killed the cockroach. Oothecae production for the female as was more optimal at a 25% protein diet. Although there is a trend of protein and carbohydrates being essential for various reproductive functions including copulation success, egg development, and egg production, the ratio"
"parameters as the percentage of intramuscular fat. Adult mammalian muscle flesh consists of roughly 75 percent water, 19 percent protein, 2.5 percent intramuscular fat, 1.2 percent carbohydrates and 2.3 percent other soluble non-protein substances. These include nitrogenous compounds, such as amino acids, and inorganic substances such as minerals. Muscle proteins are either soluble in water (sarcoplasmic proteins, about 11.5 percent of total muscle mass) or in concentrated salt solutions (myofibrillar proteins, about 5.5 percent of mass). There are several hundred sarcoplasmic proteins. Most of them – the glycolytic enzymes – are involved in the glycolytic pathway, i.e., the conversion of"
"Complete protein A complete protein or whole protein is a food source of protein that contains an adequate proportion of each of the nine essential amino acids necessary in the human diet. Examples of single-source complete proteins are red meat, poultry, fish, eggs, milk, cheese, yogurt, soybeans and quinoa. The concept does not include whether or not the food source is high in total protein, or any other information about that food's nutritious value. It was once thought that plant sources of protein are deficient in one or more amino acids, and so vegetarian diets had to specifically combine foods"
"least expensive sources of dietary protein. For this reason, soy is important to many vegetarians and vegans. Soy flour contains 50% protein. The digestibility of some soyfoods are as follows: steamed soybeans 65.3%, tofu 92.7%, soy milk 92.6%, and soy protein isolate 93–97%. Some studies on rats have indicated the biological value of soy protein isolates is comparable to animal proteins such as casein if enriched with the sulfur-containing amino acid methionine. When measuring the nutritional value of protein, the original protein efficiency ratio (PER) method, first proposed by Thomas Burr Osborne and Lafayette Mendel in 1917, was the most"
"incompletely absorbed in some animals. Proteins are the basis of many animal body structures (e.g. muscles, skin, and hair). They also form the enzymes which control chemical reactions throughout the body. Each molecule is composed of amino acids which are characterized by the inclusion of nitrogen and sometimes sulfur. The body requires amino acids to produce new proteins (protein retention) and to replace damaged proteins (maintenance). As there is no protein or amino acid storage provision, amino acids must be present in the diet. Excess amino acids are discarded, typically in the urine. For all animals, some amino acids are"
"muscle, small intestine, liver, and kidney); an additional transcript of approximately 4 kb has been detected in pancreas and thymus, suggesting a tissue-specific alternative splicing. Menin is a 610 amino acid (67Kda) nuclear protein, highly conserved from mouse (98%), rat (97%) and, more distantly, zebrafish (75%) and Drosophila (47%) (47-51). Human and mouse MEN1 amino acid sequences share 95.8% identity and 98.4% similarity. Analysis of menin amino acid sequence did not reveal homologies to any other known human or mammalian protein, sequence motif, or signal peptide. The absence of significant homology to any other protein complicates efforts to elucidate the"
"little research has been provided about the nature of the kangaroo protein and its composite amino acid profile. Of the 22 amino acids within protein, ten are vital to human and animal well-being because they can't be manufactured in the body. These are called 'essential amino acids' and the primary research on Kangaroo muscle meat nutrition is from a seminal research paper by the primary Australian Government Science organisation CSIRO in 1970. Using this research paper as a primary data source Essential Amino acids have been calculated for dried Kangaroo muscle meat (DM) and compared to various other farmed meat"
"Bounous G., Gold P. Clin Invest Mod. 1991 Aug;14(4) :296-309 (1991) This study compared the effects of different sources of whey protein concentrate (20 g/100 g diet) and of casein on the spleen, liver, and heart glutathione content of C3H/HeJ mice, and on the immune response of their spleen cells to sheep red blood cells. Body weight curves were similar in all dietary groups. Our data indicate that the humoral immune response is highest in mice fed a dietary whey protein concentrate exhibiting the highest solubility (undenatured conformation) and a greater relative concentration of the thermolabile cystine rich proteins. In"
"28 of the total 29 exons. Primates have an elongated 3’ end compared to other mammalian species. Reptiles, birds, and fish also have a truncated 3’end, compared to primate transcripts. The protein is a nuclear encoding mitochondrial protein. The protein in humans has 1760 amino acids. The protein is considered largely neutral, though 17% of the primary structure is composed of the hydrophobic leucine-rich repeats. The leucine-rich repeat forms a structural horseshoe shape, which encourages protein-protein interactions. The most common translated isoform has a predicted molecular weight of 199.3 kdal. Compared to an average of human sequences, the internal composition"
"during meals, which would create a complete protein. However, the most recent position of the Academy of Nutrition and Dietetics is that protein from a variety of plant foods eaten during the course of a day supplies enough essential amino acids when caloric requirements are met. Normal physiological functioning of the body is possible if one obtains enough protein and sufficient amounts of each amino acid from a plant-based diet. In fact, the highest PDCAAS scores are not given to commonly eaten meat products, but rather to animal-derived vegetarian foods like milk and eggs and the vegan food soy protein"
"for leather traders and meat producers there and elsewhere. Their prediction estimated a twenty percent shortage of beef and a thirteen percent shortage of leather in the world market. In 2003, Cuba banned cow slaughter due to severe shortage of milk and milk products. Beef is a source of complete protein and it is a rich source (20% or more of the Daily Value, DV) of Niacin, Vitamin B12, iron and zinc. Red meat is the most significant dietary source of carnitine and, like any other meat (pork, fish, veal, lamb etc.), is a source of creatine. Creatine is converted"
"Casein Casein ( ""KAY-see-in"", from Latin ""caseus"" ""cheese"") is a family of related phosphoproteins (αS1, αS2, β, κ). These proteins are commonly found in mammalian milk, comprising c. 80% of the proteins in cow's milk and between 20% and 45% of the proteins in human milk.The j Casein has a wide variety of uses, from being a major component of cheese, to use as a food additive. The most common form of casein is sodium caseinate. As a food source, casein supplies amino acids, carbohydrates, and two essential elements, calcium and phosphorus. Casein contains a high number of proline residues,"
"protein sources. Meat, products from milk, eggs, soy, and fish are sources of complete protein. Whole grains and cereals are another source of proteins. However, these tend to be limiting in the amino acid lysine or threonine, which are available in other vegetarian sources and meats. Examples of food staples and cereal sources of protein, each with a concentration greater than 7.0%, are (in no particular order) buckwheat, oats, rye, millet, maize (corn), rice, wheat, sorghum, amaranth, and quinoa. Vegetarian sources of proteins include legumes, nuts, seeds and fruits. Legumes, some of which are called pulses in certain parts of"
"filaments depending on the concentration of calcium cations in the surrounding medium. Actin is one of the most abundant proteins in eukaryotes, where it is found throughout the cytoplasm. In fact, in muscle fibres it comprises 20% of total cellular protein by weight and between 1% and 5% in other cells. However, there is not only one type of actin; the genes that code for actin are defined as a gene family (a family that in plants contains more than 60 elements, including genes and pseudogenes and in humans more than 30 elements). This means that the genetic information of"
"food which becomes incorporated into the proteins of the organism's body. Newborns of mammals are exceptional in protein digestion and assimilation in that they can absorb intact proteins at the small intestine. This enables passive immunity, i.e., transfer of immunoglobulins from the mother to the newborn, via milk. Considerable debate has taken place regarding issues surrounding protein intake requirements. The amount of protein required in a person's diet is determined in large part by overall energy intake, the body's need for nitrogen and essential amino acids, body weight and composition, rate of growth in the individual, physical activity level, the"
"Costantino A.M., Balzola F., Bounous G. Minerva Dietol Gastroenterol 35(4): 241-5 (1989) A whey protein diet has been shown to enhance splenic immune response to sheep red blood cells (SBRC) in mice. This study was designed to investigate the influence of the type of dietary protein on the biliary secretory IgA. A/J mice were fed defined formula diets containing either 20% whey protein, or 20% casein. Another group was fed Purina mouse chow. After 3 weeks of dietary treatment the body weight of each mouse was recorded and the gall-bladder was removed and its whole content analyzed by ELISA to"
"hair, skin, ligaments, cartilage, and chest and abdomen organs are structurally supported by protein. In comparison to the average dog, a performance or sporting dog requires a greater protein intake. This is a result of wear and tear on muscles and other organ tissues caused by strenuous activity. Protein is also a vital component in bodily functions such as transporting oxygen and energy to the muscles, regulating blood glucose levels, fighting infections, and repairing tissues. Many diets targeted for performance dogs contain 30% protein. However, dogs performing in different athletic activities can require varying amounts of protein and essential amino"
"have a residual moisture content in the 4-8% range. Any animal that consumes a whole protein must break down and digest the protein order to absorb the nutrients. For humans this begins with chewing and the addition of saliva enzymes, followed by acid and protease enzyme digestion in the stomach, whereby the end result is a peptide or amino acid fraction ready for uptake into the blood stream via the small intestine. Research has confirmed that most animals have more Peptide receptors in the gut and lower intestine than they do free amino acid receptors - as such the peptide"
"bodybuilders should consume 25–30% of protein per total calorie intake to further their goal of maintaining and improving their body composition. This is a widely debated topic, with many arguing that 1 gram of protein per pound of body weight per day is ideal, some suggesting that less is sufficient, while others recommending 1.5, 2, or more. It is believed that protein needs to be consumed frequently throughout the day, especially during/after a workout, and before sleep. There is also some debate concerning the best type of protein to take. Chicken, turkey, beef, pork, fish, eggs and dairy foods are"
"value on cow milk. The non-protein nitrogen (NPN) accounts for an average of 16% of total nitrogen in donkey milk, is much closer than values reported for human milk (20%) but higher than those of domestic ruminants (5%). The amino acid profile of the donkey milk proteins shows a very similar percentage of essential amino acids (36.7 e 38.2 g amino acid /100 g protein) than in human milk proteins (40.7 g amino acid /100 g protein), according to Guo et al. Among the functional proteins detected in donkey milk, there are molecules active in antimicrobial protection such as lysozyme"
"plants tend to have less protein per weight than animal sources such as eggs or milk, they are nevertheless ""complete"" in that, as a whole, they contain all of the amino acids essential in human nutrition. The same is true for algae and marine phytoplankton. Eating various plant foods in combination can provide a protein of higher biological value. Certain native combinations of foods, such as corn and beans, soybeans and rice, or red beans and rice, contain the essential amino acids necessary for humans in adequate amounts. Protein content in foods is often measured in protein per serving rather"
"high protein-to-phospholipid ratio (more than 3:1 by weight, which is about 1 protein for 15 phospholipids). The inner membrane is home to around 1/5 of the total protein in a mitochondrion. In addition, the inner membrane is rich in an unusual phospholipid, cardiolipin. This phospholipid was originally discovered in cow hearts in 1942, and is usually characteristic of mitochondrial and bacterial plasma membranes. Cardiolipin contains four fatty acids rather than two, and may help to make the inner membrane impermeable. Unlike the outer membrane, the inner membrane doesn't contain porins, and is highly impermeable to all molecules. Almost all ions"
"blood. In mammals, the protein makes up about 96% of the red blood cells' dry content (by weight), and around 35% of the total content (including water). Haemoglobin has an oxygen-binding capacity of 1.34 mL O per gram, which increases the total blood oxygen capacity seventy-fold compared to dissolved oxygen in blood. The mammalian hemoglobin molecule can bind (carry) up to four oxygen molecules. Hemoglobin is involved in the transport of other gases: It carries some of the body's respiratory carbon dioxide (about 20–25% of the total) as carbaminohemoglobin, in which CO is bound to the heme protein. The molecule"
"among other products. Animal foods such as meat, dairy, and eggs are high in protein and “dietary animal protein intake is highly correlated with renal net acid excretion”. Research dating back to the early 1900s has shown correlations between high protein diets and increased acid excretion. One measure of the acidic or basic effects foods have in the body is Potential Renal Acid Load (PRAL). Cheeses with protein content of 15 g protein/100g or higher have a high PRAL value of 23.6 mEq/100 g edible portion. Meats, fish, other cheeses and flour or noodles all have a PRAL around 8.0"
"protein (Immunocal®) versus casein by approximately 10% when expressed in kg per kg body weight (BW) and in kg per kg lean body mass (LBM) (p <0.05), hence the potential impact to perform daily tasks. Whey protein (lactalbumin) is widely used by bodybuilders and other athletes due to current view by nutrition professionals and the American College of Sport Medicine that the protein needs of athletes may me higher than those of non-athletes [2]. One particular lactalbumin product, known commercially as Immunocal® or HMS 90® and sold in Canada and the United States, is listed in the Physician's Desk Reference"
"Protein content includes myelin basic protein (MBP), which is abundant in the CNS where it plays a critical, non-redundant role in formation of compact myelin; myelin oligodendrocyte glycoprotein (MOG), which is specific to the CNS; and proteolipid protein (PLP,) which is the most abundant protein in CNS myelin, but only a minor component of PNS myelin. In the PNS, myelin protein zero (MPZ or P0) has a similar role to that of PLP in the CNS in that it is involved in holding together the multiple concentric layers of glial cell membrane that constitute the myelin sheath. The primary lipid"
"urine. For all animals, some amino acids are ""essential"" (an animal cannot produce them internally) and some are ""non-essential"" (the animal can produce them from other nitrogen-containing compounds). About twenty amino acids are found in the human body, and about ten of these are essential and, therefore, must be included in the diet. A diet that contains adequate amounts of amino acids (especially those that are essential) is particularly important in some situations: during early development and maturation, pregnancy, lactation, or injury (a burn, for instance). A ""complete"" protein source contains all the essential amino acids; an ""incomplete"" protein source"