How are you doing over there? Guys. Today we are going to look at the composition of proteinss we have already studied at various institutions, as we know that proteins are the organic compounds which are one of the essential nutrients are also source of energy and structures of our bodies. They are composed of carbon, hydrogen, oxygen and nitrogen elements but some proteins also have phosphorous and sulphur in place of nitrogen in their composition. These elements combine to form alpha carbon group, hydrogen group, carboxyl group, amine group and variable group. These groups combine to form 69 types of various amino acids which are the basic units of proteins, Let me clear you that different types of amino acids are due to the reason they contain different variable groups. When many amino acids link together, they form polypeptide chain with peptide bonds between each of the two amino acids. Finally these polypeptide chains combine to form complex proteins of our bodies. That is what we had to take a loot at today and i hope you are going to enjoy the post because it is aimed at reviving your concept about proteins.