Primary structure: >The primary structure is the sequence of amino acid residues that constitute the polypeptide chain >Amino acids have the same general structure,but side-chain groups vary in size, shape,charge,hydrophobicity and reactivity Primary structure: ➢ The primary structure is the sequence of amino acid residues that constitute the polypeptide chain ➢ Amino acids have the same general structure, but side-chain groups vary in size, shape, charge, hydrophobicity and reactivity