+A polypeptide is a molecular chain of [amino acids](/wiki/amino_acid) linked by [peptide bonds](/wiki/peptide_bond). These fundamental sequences often fold into complex three-dimensional structures, becoming the functional [proteins](/wiki/protein) vital for all living systems.
+## See also
+- [Protein](/wiki/protein)
+- [Amino Acid](/wiki/amino_acid)
+- [Biochemistry](/wiki/biochemistry)
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