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Peptides should be stored at -20 °C for maximum stability. Because peptides are often hygroscopic, and water content can significantly alter the peptide powder’s weight, warm peptide samples to room temperature in a desiccator prior to opening. Adsorption of water may decrease stability and reduce the overall peptide content, if portioned by weight.
Dissolve peptides in an appropriate buffer: acidic peptides in basic buffer and basic peptides in acidic buffer. If necessary, sonicate briefly.
Peptides containing Trp, Met or Cys require special care to avoid oxidation. Oxygen-free water or reducing agents may be used.
For storage, peptide solutions should be aliquoted and kept frozen at -20 °C or below. Most peptides containing Trp, Met, Cys, Asn or Gln have limited shelf life. Longterm storage is not recommended. Please contact our technical support for more product-specific recommendations regarding handling and reconstitution of individual peptides.