Peptide

polypeptide is a compound composed of two or more amino acids connected by peptide bonds. A polypeptide is composed of multiple amino acids connected by peptide bonds, usually composed of 10 to 100 amino acid molecules, with a relative molecular mass of about 500 to 10,000 Daltons, and a molecular weight between small molecule drugs and large molecule protein drugs. It is a special "protein". Due to its small molecular weight, polypeptides can be directly absorbed by the human body. Polypeptides are widely present in organisms, and tens of thousands of species have been discovered. They play a key role in regulating and controlling the functions of various systems, organs, tissues and cells in organisms, and are essential to life processes.