Why is Protein important ?
827476
Protein comes from animal sources-meat, eggs\n\nProtein~~>\nEssential for life\nbuilds and repairs all tissues\nForms antibodies to fight infections\nSupplies some energy\nHelps maintain fluid balance\nAssists in acid-base balance\nBuilds lean muscle mass\n\nGood Luck
13431
Peptides are chains of at least 2 amino acids.  A long peptide is typically called a protein.  Proteins do a lot of different things in the body.\n\nChemical reactions in th body need something to make them go faster, and proteins called enzymes do this.  For sugar and other molecules to go in and out of cells, channels or transport molecules have to be in cell membranes, and these are composed of protein.\n\nSkin and bone have a very strong fibrous protein in them called collagen.  In muscle the proteins actin and myosin interact (along with some other proteins) to give muscle contraction.\n\nYour body can even use peptides and proteins as an energy source, by breaking them down and burning them as fuel.
513695
That is because heat destroys the structure of a functional protein.\nproteins are long chains of amino acids. This chain of amino acid folds up into a 3 dimensional structure via intramolecular forces. like you can fold up a long, blown-up balloon into a giraffe or a dog. With this structure, proteins are able to perform its functions. but when you heat the protein, you break the bonds in the amino acid chain, unfolding it and destroying its 3 dimensional structure. (IE, breaking the giraffe back to a long baloon, obviously it doesn't look like a giraffe anymore) and the protein cannot perform its functions.
843668
That would depend on the protein...Some proteins are needed in the nucleus (such as transcription factors), so they will go through their respective transporters into the nucleus. Other proteins need to get embedded in the cell membrane (such as receptors). Some proteins are enzymes and find other molecules to bind with and change...\n\nAlso, I forgot, most proteins go through post-translational modification (splicing, methylation, etc) before they are actually functional.
538490
Because if you want to get big and strong, taking protein powder may be supplemental on the daily basis. \n\nMany bodybuilders out there will make sure they get enough of protein powder to beef up their bodies through strenuous weight training and exercise. \n\nNot just for Bodybuilders, though, average joes like you and I can take it to promote healthful benefits such as boosting our immune system, speeding up recuperation of wounds and sores from injury. Above all, our body needs protein to maintain our muscle tone; similar to the need for drinking water everyday.\n\nSo Starting your day with protein powder provides a beneficial means of health throughout the rest of the day!
233031
One function of proteins is structural.  They are kind of like the framework of a cell, known as a cytoskeleton.  Proteins also make up structural features such as your hair.  The second function of proteins in the human body is a biochemical function.  Our enzymes are proteins.  Without them we would not be able to digest our food, use the energy we get from food, repair our cells, carry oxygen from the air we breathe around our body, fight off infection, and many, many other things.  Proteins are so important to the human body that the function of our DNA is to code for our proteins!  That's what DNA mostly does, it just tells our body what protiens to make and in what amounts.
885040
the building blocks of protein
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It depends on your weight and activity level.  Use this calculator to find out exactly how much you require:\n\nhttp://www.preventdisease.com/healthtools/articles/protein.html
534548
Proteins are the workhorses of an organism, providing everything from immunoresponse, enzymatic reactions, hormones and hormone receptors, and transport and channel proteins that move things in and out of cells. On top of all this proteins are the ultimate expression of our genes, since DNA codes for amino acids which form polypeptides which form proteins. Everything that makes you... you and all the features of other animals is the result of your genes expression in the form of proteins, like the color of your hairs and eyes. Proteins can also be a source of energy .\n\nI was going to complement Always Right's answer until I saw the wikipedia entry which it is copied and pasted from, it's fine to use sources (I'm using my bio 101 notes) but at least reference them, not say "Life"\n\nIt's also important to note that DNA is NOT a protein, DNA is a nucleic acid, a biological molecule separate from proteins.
110870
Add more protein to your diet.
756226
The proteins shape determines its function.  Most proteins have to bind to something else in order to do its job.  If it's not a specif shape, it can't bind.
1034608
Amino acid is One of the 20 building blocks of protein. The sequence of amino acids in a protein and, hence, the function of that protein are determined by the genetic code in the DNA. \n\nAmino acids are molecules that (in technical terms) contain a basic amino (NH2) group, an acidic carboxyl (COOH) group and a side chain attached to an alpha carbon atom. \n\nThe 20 amino acids are alanine, arginine, asparagine, aspartic acid, cysteine, glutamic acid, glutamine, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine. \n\nMost dietitians say it is unhealthy for people but it depends on blood count and things like that you should ask you physician or doctor before you do anything
561033
protein is protein..., as long as it is a complete protein (has all the amino acids)..., you should do fine..., don't believe all the hype out there..., been down that road and now making my best gains with eating right and an ordinary shake...
347461
Proteins' main fuctions are to serve as biological catalysts in living things. That means that they allow biological processes to occur faster and more efficeintly. Also proteins are used to regulate biological functions. They serve other functions also such as chemical messengers, building blocks, and transporters. Because DNA, the code of life, encode ultimately for proteins, the proteins are central to almost every biological process from respiration to reproduction. The easier question to ask is what proteins don't do.
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The function of a protein depends on its shape.  If you alter the shape of it, you alter its function.  pH is a factor that can alter the shape, because the pKa values of residues on the protein will dictate which residues are or are not protonated, and that will, in turn, affect the manner in which the various amino acids will form internal ionic bonds.\n\nTemperature is another factor.  the stability of intramolecular bonding is dependent on the level of thermal excitation.  If a protein is at a high temperature, the thermal motion of the atoms might upset their abilities to form bonds.  At really high heat, the result will be total denaturation.  At low temperatures, you might even have the opposite problem, with a protein clinging to things in the wrong ways.\n\nFinally, you might alter it by introducing a chemical that reacts with it.  Some proteins need activator molecules to function, others might be inactivated by an inhibitor.  Enzymatic activity occurs in what is called the "active site" of the protein, which is where the substrates bind to the protein and catalysis occurs.  So the activity of the molecule might be altered by changing the arrangement of the moieties in the acive site relative to one another, of there might be a change which permits/blocks access to the active site by the substrate molecules.
933413
The body has to have a supply of amino acids for vital functions, so less vital stores of protein such as in muscles start to be broken down to supply more important functions. \n\nIf you have ever seen film or pictures of chronically starved/malnourished people then you will have noticed that their arms and legs are very wasted as much of the muscle will have been broken down to allow amino acids to be used in the function and repair of organs such as the brain, heart, liver etc. Organisms with impaired liver and/or kidney function tend to suffer from the same problems as these illnesses often suppress appetite.
875719
The particulare foods dont matter very much...eat a good balanced diet.  \n\nDaily protein consumption should be 1.4-1.7 kilograms per gram of body weight, according to the American College of Sports Medicine.  Consuming more protein will not be beneficial and could be unhealthy.\n\nYou can get the protein from regular foods, supplements are not necessary unless you have problems getting the calories and protein that you need in your diet.