Explain classification and composition of proteins, Biology

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Proteins - classification, composition and biological functions

 Proteins, as you may already know, are made up of carbon, hydrogen, nitrogen, oxygen and usually sulphur. Proteins are built up of a large number of amino acid molecules inter linked by peptide bonds as illustrated in figure. All the amino acids have a trivial or common name, many a times is related to the source from which they have been first isolated. For example:

 

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