Proteins and Their Functions

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Proteins The word protein originates from the Greek word protos which denotes "the first rank of importance", in all biological systems we find macromolecules called proteins which range from as low as prokaryotes to higher eukaryotes. Naturally proteins are complex in nature performing numerous functions that sustain life. Besides other polymers for instance nucleic acids, polysaccharides, or lipid assembles, proteins account for almost over 50% of the total dry weight of cells, They occupy the largest percentage in living cells both quantity and quality . Proteins are involved in all biological processes, for instance enzymes(specific proteins), catalyze all chemical reactions that occur in all life forms, they also transport and store wide range of ions and small molecules as well as electrons. They play a role in the regulation of the expression of genetic information and their transcription of translation level in connection with the control of growth and differentiation of cells; they also among other important functions provide the mechanical support and filamentation architecture within and between cells consequently important to cellular contraction and coordination of motion (alan.j.cozzone, n.d). Considering their vital importance in living organisms, biochemists have always given priority to the investigation of the structure and functional property of proteins; they can be differentiated based on the number of amino acids (residue) in them, their overall
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