Condensation Reaction

Figure: 1 Condensation reaction
A condensation reaction of two amino acids forms a peptide bond (-CO-NH-). Peptide bonds forms when the -OH group of the carboxyl group of one amino acid and the hydrogen atom of the amino group (-NH2) of another are elimated forming water. Also known as a dehydration reaction. The nitrogen of the amino group then bonds with the carbon of the carboxyl group of the other amino acid.
When many amino acids link together by peptide bonds, they are called polypeptides. The process of linking MANY amino acids together is called condensation polymerization.