FAQ How should I store and handle my synthesized peptides?

Peptides are shipped at room temperature, and are highly stable at lyophilized form in sealed bags. Peptides should not be kept in solution for long periods of time.

• Peptide storage guidelines: For long-term storage, peptides should be stored in lyophilized form at -20°C, or preferably at -80°C with desiccant in sealed containers to minimize peptide degradation. Under these conditions, peptides can be stored for up to several years. This type of storage prevents bacterial degradation, oxidation, and the formation of secondary structures.
• Opening the package: It is better to equilibrate the peptides to room temperature in a desiccator prior to opening and weighing. Failure to warm the peptides beforehand can cause condensation to form (peptides tend to be hygroscopic) on the product when the bottle is opened. This will reduce the stability of the peptides. Before reconstitution, centrifuge the vial of lyophilized peptide at 12,000 x g for 20 seconds. This will help pellet the entire peptide sample for reconstitution.
• Weighing peptides: Weigh out your required quantity of peptide rapidly and store all unused peptide at -20°C or below. Sequences that contain cysteine, methionine, tryptophan, asparagine, glutamine, and N-terminal glutamic acid will have a shorter shelf life than other peptides.

Eva He

eva@pepmic.com

Pepmic Co.,  Ltd

www.pepmic.com