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Mulder GD, Patt LM, Sanders L, Rosenstock J, Altman MI, Hanley ME, Duncan GW

Proper peptide storage and handling prove essential, with lyophilized peptides requiring storage at -20C or lower (optimally -80C) away from bright light and moisture, and peptides containing cysteine, methionine, or tryptophan requiring additional protection from oxidation through anaerobic storage conditions to maintain stability and biological activity throughout experimental protocols

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Research-grade peptides are manufactured for laboratory settings, are labeled "not for human use," and are not subject to the same regulatory oversight