Health Care

The Different Types of Peptide Classes

There are various ways of classifying peptides. The most common approach of classifying peptides is to use the number of amino acids making the sequence of that peptide. The shortest peptide consists of two amino acids, and as such, they are normally classified as a dipeptide.

A peptide with three amino acids is known as a tripeptide and one with four amino acids is known as a tetra peptide. Such classifications can go on and on, just taking note of the number of the amino acids in the peptide chain. But other than this classification, there are also different types of peptide classes which can be used to distinguish them. Presently, the following classes are available:

Milk Peptides

Milk peptides are obtained from milk proteins through the breakdown of various digestive enzymes or through the process of proteinases during the fermentation process of milk.

Ribosomal peptides

These peptides are as a result of the synthesis of translated mRNA. In most cases, they are subjected to a process known as proteolysis which leads to the generation of their mature form. Ribosomal peptides function as higher organisms in the peptide hierarchy. They can also be used as hormones as well as for signaling molecules.

Different Types of Peptide Classes

Nonribosomal peptides

These are the results of the assembly of peptide-specific enzymes and not ribosomes. In most cases, the peptides are cyclic and they can always exhibit a higher complex cyclic structure, though it is also fairly common to find linear nonribosomal peptides.


Peptones are simply peptides obtained from animal milk or from meat digested through the process of proteolytic digestion.

Peptide fragments

These are simply fragments of proteins used to calculate the data related to specific types of proteins. In most cases, peptide fragments are due to the degradation of enzymes performed in the laboratory on a controlled sample, though the degradation can also happen as a result of a natural process.