Peptides will arrive as a lyophilized form. Lyophilized peptides generally have very good stability and the short-term temperature change during shipping should not affect the product quality and efficacy. However, we recommend storing the lyophilized peptides at –20 ° C upon arrival and at this temperature, most lyophilisates can be stable for years without significant degradation.
Peptides are often hygroscopic. The absorption of moisture may decrease the stability and reduce the overall product quality. To avoid this, the vial should be always tightly sealed and when preparing for use, peptides should be allowed to warm to room temperature before opening the vial. We recommend that you only dissolve the needed amount into a buffer. The remainder of the stock should be stored dry at –20 ° C. The majority of peptides, both acidic and basic peptides, are most stable in acidic condition. Aliquots of remaining peptide solution can be stored frozen for a short term, however, for maximal stability, we recommend re-lyophilizing the solution and re-constituting the compounds.
Peptide solubilization often presents a problem for the researchers. We recommend first attempting to determine the solubility by dissolving with Bacteriostatic Water if the Peptide still appears cloudy or gluey it is advised to use 1/4 acetic acid