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. The amino acids form peptide bonds between each other, thus forming a polypeptide chain. …
