What is the monomer of protein and why does it matter?
                                
                                
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                                    4 min read                                
                            
                                Over 50% of the dry weight of a human cell is composed of protein, and the fundamental building block that makes up these complex molecules is the amino acid. So, what is the monomer of protein? A protein monomer is an amino acid, and understanding its structure and function is key to comprehending how life itself operates.