= Polypeptide
= Polypeptide chain
{synonym}
A <polypeptide> is a chain of <amino acid residues> linked by <peptide bonds>. The term describes chain chemistry; calling a chain a <polypeptide> alone does not establish that it is folded or functional. The <gene expression> example N–<methionine>–<alanine>–C contains two <amino acid residues> and one <peptide bond>; the twelve-residue example under <protein> contains eleven <peptide bonds>. See https://iupac.qmul.ac.uk/AminoAcid/A1416.html[IUPAC-IUB: amino-acid symbols and representation of residues in chains].
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