Peptide (English: peptide, from Greek "digestion"), formerly known as peptide, also known as peptide, is a naturally occurring small biomolecule, between amino acids and proteins substance.

Since amino acids are the smallest molecules and proteins are the largest, they are short chains of amino acid monomers connected by peptide (amide) bonds. This highly valent chemical bond is formed when the carboxyl group of one amino acid reacts with the amino group of another amino acid.

The common ones are dipeptide, tripeptide, and even polypeptide, etc., while 2-20 peptides are oligo-peptides and 20-50 peptides are polypeptides. Usually those with less than ten peptides have more medical and commercial practicability.

Extended information:

Peptides can be chemically hydrolyzed from dietary protein (dietary protein), or they can also be obtained artificially. It is composed of the polymerization of two or more amino acids and is very important in the regulation of cell physiology and metabolic functions. Most peptides are unstable in nature and should be protected from moisture and stored below 4°C for long-term storage.

Peptide is a chain molecule formed by dehydration and condensation of the amine group (-NH2) and carboxyl group (-COOH) of amino acids to form a peptide bond.

The peptide bond is a -CO-NH- bond formed by the dehydration condensation reaction of one amino acid and the amine group of the next amino acid. It has the nature of a double bond and is connected to the six adjacent atoms. On the same plane, C-N cannot rotate freely, and peptide bonds are the connections that constitute the protein structure.

Baidu Encyclopedia - Peptides