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General Peptide Information1 min readJanuary 28, 2026
What Are Peptides?
## What Are Peptides? Peptides and proteins are both made up of amino acids that are linked together (by peptide bonds, hence the name) in long chains called polymers. The only thing that separates peptides from proteins is how big they are. While there is no absolute cutoff, peptides are made up of fewer amino acids than proteins and hence are much smaller. In general, any amino acid chain that is longer than fifty residues in length is referred to as a protein. This is because after growing b
What Are Peptides? Peptides and proteins are both made up of amino acids that are linked together (by peptide bonds, hence the name) in long chains called polymers. The only thing that separates peptides from proteins is how big they are. While there is no absolute cutoff, peptides are made up of fewer amino acids than proteins and hence are much smaller. In general, any amino acid chain that is longer than fifty residues in length is referred to as a protein. This is because after growing b
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A peptide is a chain of amino acids linked to one another by amide (peptide) bonds. A peptide bond is the covalent chemical bond formed when the carboxyl group of one amino acid reacts with the amino group of another. The word peptide is derived from the greek word πεσσειν, which means "to digest." Peptides are an essential part of nature and there are thousands of them that occur naturally in the human body and in animals, but new synthetic peptides are being discovered daily, which show a prom
A peptide is nothing more than a string of amino acids that is similar to, but not identical to, a protein. To understand what a peptide is and how it differs from a protein, it is necessary to first understand what an amino acid is. **What Are Amino Acids?** Amino acids are biologically important molecules, but not all of them are used by living organisms. In fact, the human body requires only 20 different amino acids to function (the case for almost all living things), even though nearly 500 h