Peptide fundamentals
What are peptides?
A straightforward introduction to peptides, how they differ from proteins, and why scientists use them in laboratory research.
If you have ever asked "what are peptides?", you are not alone. Peptides are one of the most studied classes of molecules in modern biochemistry. In short, a peptide is a short chain of amino acids — the same building blocks that make up proteins. Their smaller size gives researchers precise control when studying biological processes in the lab.
Peptides are short chains of amino acids
A peptide is a short chain of amino acids linked by peptide bonds. Proteins are longer chains of the same building blocks, so peptides can be thought of as smaller protein fragments. Their compact size lets researchers study specific biological signals without the complexity of a full-length protein.
Why researchers use peptides
In laboratory settings, peptides are used to investigate cell signalling, receptor binding and enzyme activity. Because they can be synthesised to exact sequences, scientists can isolate one biological mechanism at a time.
Synthetic vs naturally occurring peptides
Many research peptides are synthesised to mirror compounds found in the body. This gives laboratories a consistent, reproducible supply for in vitro and controlled studies. Synthetic production also allows precise modifications that are difficult to obtain from natural sources.
Research only, not for human use
Research peptides are intended for laboratory and in vitro use only. They are not approved for human consumption, diagnosis, or treatment. Any researcher purchasing peptides should understand and follow all applicable Australian regulations.
Common research peptide categories
Research peptides are often grouped by the biological system they help study. Examples include synthetic fragments such as BPC-157 and TB-500, copper-binding peptides such as GHK-Cu, and mitochondrial-derived peptides such as MOTS-c. Each category is used in controlled laboratory settings to understand specific signalling pathways.
Buying research peptides in Australia
Australian researchers can buy research peptides from suppliers who state purity, provide documentation, and ship with temperature-stable packaging. At Strand, every product is sold strictly for laboratory research, with ≥99% purity, independently tested. We ship Australia-wide.
Frequently asked questions
- What is the difference between a peptide and a protein?
- Both are made of amino acids, but peptides are shorter chains — typically fewer than 50 amino acids. Proteins are larger, more complex molecules that often fold into specific three-dimensional structures.
- What are peptides used for in research?
- Researchers use peptides to study cell communication, receptor binding and enzyme activity. Their small size makes them useful for targeted experiments.
- Are peptides legal in Australia?
- It depends on the compound. Some peptides are listed in the Poisons Standard, and state and territory law controls who may possess or supply them; others are not individually listed. No research peptide is approved for human consumption, therapeutic use or diagnostic purposes, and buyers are responsible for checking the current Poisons Standard and their own state or territory's requirements before ordering.
- How are research peptides supplied?
- Most research peptides are supplied as lyophilised (freeze-dried) powders in sealed vials. This form is stable for shipping and long-term storage when kept cold and protected from moisture.
Explore Strand research peptides
Browse our independently tested research peptides Australia-wide, including BPC-157, TB-500, CJC-1295, GHK-Cu, MOTS-c and more.