How stable is my PepMix™?
Since PepMixes contain freeze dried peptides, stability is determined by the stability of the single peptides in the mix. Generally, most peptides are stable over years when stored at -20°C in freeze dried state. However, peptides containing amino acids such as Met, Cys or N-terminal Gln tend to oxidation or pyroglutamate formation. Since kinetics of such deterioration depends on primary peptide structure, stability can hardly be predicted. Therefore, we recommend usage of peptide pools within 6 months. For clinical trials, we offer stability testing via our custom Pepmix program. Avoid repeated freeze/thaw cycles of dissolved PepMixes!
