Peptide Information and Education
What Are Peptides?
Peptides are short chains of amino acids, typically consisting of 2 to 50 amino acids linked by peptide bonds. They play critical roles in biological processes, acting as signaling molecules, hormones, and neurotransmitters.
How Are Peptides Synthesized?
Research peptides are primarily produced through solid-phase peptide synthesis (SPPS), a method developed by Robert Bruce Merrifield.
Peptide Purity
Purity is one of the most critical factors in peptide research. HPLC is the standard method for both purifying and analyzing peptide purity. Research-grade peptides typically have purity levels of 95% or higher.
Proper Storage of Peptides
Lyophilized peptides should be stored at -20C or lower for long-term storage. Once reconstituted, store at 2-8C. Avoid repeated freeze-thaw cycles.
Reconstitution Guidelines
Peptides are typically reconstituted using bacteriostatic water. Add solvent slowly along the wall of the vial. Never shake or vortex vigorously.
Understanding Certificates of Analysis
A COA confirms the identity, purity, and quality of a peptide including molecular weight, purity percentage, amino acid sequence, and appearance data.
Peptide Stability
Stability depends on amino acid composition, pH, temperature, and light exposure. Some peptides contain oxidation-sensitive residues requiring special handling.
Research Applications
Peptides are used in receptor binding studies, enzyme inhibition assays, cell signaling pathway analysis, SAR studies, and bioassay development.
Quality Control
Maintaining quality control is essential for reproducible results. Verify identity and purity before use, ensure proper storage, use appropriate controls, and document lot numbers.
Peptide Nomenclature
Peptides are named based on their amino acid sequence using standard three-letter or one-letter codes. Modified peptides include additional notation.
Safety in Peptide Research
Follow proper laboratory safety protocols including appropriate PPE, designated laboratory spaces, institutional biosafety guidelines, and proper disposal of unused materials.