In modern biological science and biotechnology research, peptides and proteins are two of the most important molecular structures studied by scientists. Both are made from amino acids and are essential to nearly every biological process that occurs within living organisms. However, while peptides and proteins share a common foundation, they differ significantly in size, structure, biological function, and their role in research applications.

Peptides play a fundamental role in nearly every biological system in the human body. These small chains of amino acids act as signaling molecules that help regulate many physiological processes, from metabolism and immune response to cellular repair and hormone signaling. Because of their precise biological activity, peptides have become an important focus of scientific research, biotechnology, and pharmaceutical development.