Peptides vs proteins - what's the difference?

Peptides vs proteins - what's the difference?
If you’re looking for the difference between peptides and proteins, the short answer is ‘size’.

Both peptides and proteins are made up of strings of the body’s basic building blocks – amino acids – and held together by peptide bonds. In basic terms, the difference is that peptides are made up of smaller chains of amino acids than proteins.

But the definition, and the way scientists use each term, is a little loose. As a general rule, a peptide contains two or more amino acids. And just to make it a little more complicated, you will often hear scientists refer to polypeptides – a chain of 10 or more amino acids.

Dr Mark Blaskovich from the Institute for Molecular Bioscience (IMB) at The Univer