Organic compound composed of a series of amino acids linked by peptide bonds (see covalent bond) between a carbon atom of one and a nitrogen atom of the next. Peptide chains longer than a few dozen amino acids are called proteins. Biosynthesis of peptides from a succession of amino acids carried by transfer RNA molecules takes place on ribosomes and is catalyzed and controlled by enzymes. Many hormones, antibiotics, and other compounds that participate in life processes are peptides.
This entry comes from Encyclopædia Britannica Concise.
For the full entry on peptide, visit Britannica.com.
Seen & Heard
What made you look up peptide? Please tell us what you were reading, watching or discussing that led you here.