Peptides in brief
A peptide is a chain of amino acids joined by peptide bonds. Short sequences may act as signalling molecules, receptor ligands, enzyme substrates, or model compounds in laboratory studies. Larger chains with complex folded structures are generally classified as proteins.
Research peptide nomenclature often includes the sequence, molecular weight, CAS number where assigned, purity method, and storage requirements. Those details help researchers compare materials and reproduce experimental conditions.
How research peptides are synthesised
Synthetic peptides are commonly manufactured by solid-phase peptide synthesis. Amino acids are added sequentially to a resin-bound chain, then the peptide is cleaved, purified, and analysed using methods such as HPLC and mass spectrometry.
Common research categories
GLP-1 agonists
Incretin-pathway peptides used in metabolic and glucose-homeostasis research.
Growth hormone secretagogues
Compounds studied for growth-hormone release and endocrine signalling pathways.
Cell migration peptides
Sequences investigated in cell migration and extracellular matrix models.
Neuropeptides
Peptides used in cognitive, stress-response, and neuroprotective research models.
Purity, COA, and storage
HPLC purity indicates the estimated proportion of the target peptide under a stated chromatography method. A COA may also include batch identity, appearance, mass confirmation, water content, or other lot-specific observations.
Lyophilised peptides are typically stored sealed, dry, and frozen. Reconstituted solutions are more vulnerable to hydrolysis, microbial contamination, and freeze-thaw stress, so researchers should follow validated laboratory protocols and the batch COA.
Frequently asked questions
What is the difference between peptides and proteins?
Peptides are shorter chains of amino acids, commonly described as 2-50 amino acids, while proteins are larger chains with more complex folded structures.
How are synthetic peptides made?
Most synthetic research peptides are produced by solid-phase peptide synthesis, where amino acids are added step by step to a resin-bound chain before cleavage, purification, and analytical testing.
What does HPLC purity mean?
HPLC purity is an analytical estimate of how much of a sample corresponds to the target peptide peak under the stated chromatography method.
Are research peptides pharmaceutical products?
No. Research peptides are supplied for laboratory research use only and are not intended for human or veterinary diagnostic, therapeutic, cosmetic, or consumption purposes.
How should lyophilised peptides be stored?
Lyophilised peptides are typically stored sealed, dry, and frozen. Reconstituted material should be handled according to validated laboratory protocols and the supplier COA.