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Subject - Biochemistry

Peptides are natural macromolecules formed by the alignment of up to 100 amino acids (more than 100 amino acids = protein). The peptides are subdivided into the oligopeptides (up to 20 amino acids) and polypeptides (21-99 amino acids).

The typical structural characteristic of a peptide is the peptide bond or carboxylic acid amide group –CO–NH–. This is formed by the condensation of amino acids, which occurs when the carboxy group (–COOH) of an amino acid reacts with the amino group of another amino acid with the loss of a water molecule.

See also: protein