Peptide Chemistry Basics
Peptides are short chains of amino acids whose sequence defines their structure and binding behaviour.
Peptides are short chains of amino acids linked by peptide bonds.
The amino acid sequence determines the peptide's three-dimensional shape.
Shape determines which receptor a peptide can bind.
What is a peptide?
A peptide is a short chain of amino acids joined by peptide bonds. Longer chains fold into proteins; shorter chains act as signalling molecules like the hormones in this library.
Sequence defines structure
The order of amino acids — the sequence — determines how a peptide folds. That three-dimensional shape is what lets a peptide fit precisely into a receptor, like a key in a lock.
Frequently asked questions
What is the difference between a peptide and a protein?+
Both are chains of amino acids; peptides are shorter, while proteins are longer and more complex folds.
Related topics
For laboratory research use only. Not for human or animal consumption.
Continue learning
Receptor Signalling Explained
Receptor signalling is how cells convert an external molecular binding event into an internal response.
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Reconstitution, Storage & Handling
Careful reconstitution, cold-chain storage and handling preserve the integrity of peptide research materials.
Peptide Classification
How research peptides are grouped — by structure, origin and receptor target — the cluster tying together peptide chemistry and receptor biology.
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