peptide
Molecule comprising two or more amino acid molecules (not necessarily different) joined by peptide bonds, whereby the acid group of one acid is linked to the amino group of the other (CO.NH
). The number of amino acid molecules in the peptide is indicated by referring to it as a di-, tri-, or polypeptide (two, three, or many amino acids).
Proteins are built up of interacting polypeptide chains with various types of bonds occurring between the chains. Incomplete hydrolysis (splitting up) of a protein yields a mixture of peptides, examination of which helps to determine the sequence in which the amino acids occur within the protein.
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