what roles do polypeptides play
The primary structure of a polypeptide of protein determines its secondary, tertiary, and quaternary structures. Primary Structure. The primary structure of polypeptides and proteins is the sequence of amino acids in the polypeptide chain with reference to the locations of any disulfide bonds.or example: gly-gly-ser-ala. is the primary structure for a polypeptide composed of glycine, glycine, serine, and alanine, in that order, from the N-terminal amino acid (glycine) to the C-terminal amino acid (alanine).