A compound composed of two amino acids bonded together is called a dipeptide.
A dipeptide forms when the carboxyl group of one amino acid reacts with the amino group of another amino acid. During this reaction, a molecule of water is released, which is a common feature of peptide bond formation known as a condensation reaction. The resulting bond between the two amino acids is called a peptide bond.
Dipeptides are important in biochemistry because they are the simplest form of peptides and serve as the building blocks for larger protein structures. Understanding how these compounds form and their properties can help in fields like nutrition, medicine, and molecular biology.