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peptide vs. polypeptide

peptide

[pep-tahyd] / ˈpɛp taɪd /

noun

Biochemistry.

a compound containing two or more amino acids in which the carboxyl group of one acid is linked to the amino group of the other.

polypeptide

[pol-ee-pep-tahyd, -tid] / ˌpɒl iˈpɛp taɪd, -tɪd /

Biochemistry.

a chain of amino acids linked together by peptide bonds and having a molecular weight of up to about 10,000.