Amino acids are the basic structural units of proteins. They are commonly classified into six (6) groups based on the chemical or structural properties of their side chains (I will talk about groups of amino acids in another article). In total, there are 20: aspartic acid, glutamic acid, alanine, arginine, asparagine, cystine, glutamine, glycine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, proline, serine, threonine, tyrosine, tryptophan and valine.

Amino acids are found in many forms of life. They form short polymer chains called peptides or longer chains called either polypeptides or proteins. They constitute the basic elements of peptides, which contain about ten. Each peptide is linked to another by a peptide bond. Each of these combinations giving rise to different protein structures with a specific function.

What is the role of amino acids?

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