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How many amino acids are in an oligopeptide?
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Amino acid
The structure and function of amino acids.
An oligopeptide is generally defined as a peptide consisting of a small number of amino acids. While the classification can vary slightly depending on the authority, oligopeptides are typically described as having between 2 and 20 amino acids.12
In broader biochemical contexts, the term is used to distinguish these shorter chains from polypeptides, which contain a larger number of amino acids.12