BOOST YOUR RESEARCH NOW
$25 OFF YOUR FIRST ORDER
Maintaining the integrity of peptides is crucial for reliable experimental outcomes. Proper storage techniques are essential to prevent degradation, oxidation, and contamination, ensuring the longevity and efficacy of these molecules. While the susceptibility to degradation varies among peptides, implementing appropriate storage protocols significantly extends their stability, regardless of their specific composition.
Upon receipt, peptides should be immediately protected from light and maintained at low temperatures. For short-term storage, such as for use within days, weeks, or a few months, refrigeration at approximately 4°C (39°F) is generally sufficient. Lyophilized peptides often exhibit stability at room temperature for several weeks, making this storage method acceptable for immediate or near-future use.
However, for extended storage periods, spanning several months to years, freezing at -80°C (-112°F) is highly recommended. This ultra-low temperature effectively preserves peptide stability over prolonged durations. It is also crucial to minimize freeze-thaw cycles, as these can accelerate degradation. Additionally, freezers with automatic defrost cycles should be avoided due to the temperature fluctuations they induce.
Protecting peptides from atmospheric moisture and oxygen is paramount. To prevent moisture condensation on the cold surface of the peptide or its container, allow the peptide to equilibrate to room temperature before opening the vial. Similarly, minimize exposure to ambient air. Containers should be kept tightly sealed, and after removing the required amount of peptide, consider resealing the container under an inert gas atmosphere, such as nitrogen or argon, to mitigate oxidation. Peptides containing cysteine (C), methionine (M), and tryptophan (W) residues are particularly vulnerable to oxidative degradation.
To further enhance long-term stability and reduce the impact of repeated freeze-thaw cycles and air exposure, it is advisable to aliquot the peptides into smaller, experiment-specific portions.
Peptide solutions have a shorter shelf life compared to lyophilized peptides and are susceptible to bacterial contamination. Peptides containing cysteine, methionine, tryptophan, aspartic acid, glutamine, or N-terminal glutamic acid exhibit even greater instability in solution.
If storage in solution is necessary, use sterile buffers with a pH range of 5-6 and aliquot the solution to minimize freeze-thaw cycles. Peptide solutions are generally stable for up to 30 days when refrigerated at 4°C (39°F). However, peptides known for their instability should be stored frozen when not in immediate use.
Containers for peptide storage should be clean, transparent, robust, and chemically inert. The size of the container should be appropriately matched to the peptide quantity. Both glass and plastic vials are commonly used. Plastic options include polystyrene, which is clear but lacks chemical resistance, and polypropylene, which offers chemical resistance but is translucent. While high-quality glass vials provide optimal storage conditions, plastic vials are sometimes preferred for shipping to prevent breakage. Peptides can be transferred between glass and plastic containers as needed.
General Peptide Storage Recommendations:
NOTICE REGARDING RESEARCH MATERIALS: All content and materials available on this website are for informational purposes only. The compounds supplied by this entity are provided exclusively for controlled, in vitro scientific inquiry and laboratory use. These compounds are not formulated or sold as drugs, dietary supplements, or cosmetic products and are not intended for any clinical application in humans or animals. Any use outside of a laboratory research setting is strictly prohibited.
BOOST YOUR RESEARCH NOW
$25 OFF YOUR FIRST ORDER