Proteins, their uses, structure etc.

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Protein, from the Greek proteios, or 'primary', is described as being a large number of amino acids linked by peptide bonds. They are the basis of living organisms account for over 50% of the dry weight of humans. They vary enormously, from the soluble forms found in food to the long fibrous forms used in connective tissues. All proteins are combinations of about 20 differing amino acids each combined of hydrogen, carbon, nitrogen, oxygen and occasionally sulphur. …

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…perform a contraction. The actual formation of proteins takes place through protein synthesis. Firstly, in initiation all required parts (amino acids etc) of the process are pooled in one area by ribosomes. The order in which the amino acids are joined in order to form proteins is controlled by messenger RNA (mRNA). When the mRNA contains one of the stop codons the chain is terminated. The released chain is the primary structure of the protein.