Peptide Racemization in Alkaline Storage Solutions
Learn how reconstituted peptides undergo racemization through base-catalyzed alpha-carbon proton abstraction in alkaline solutions, producing D-amino acid epimers.
Articles
Proline Cis-Trans Isomerization in Reconstituted Peptides
Learn how proline cis-trans isomerization in reconstituted peptides causes conformational heterogeneity, potency variability, and bioactivity drift during storage.
Peptide Carbamylation From CO2: Storage Degradation Guide
Learn how dissolved carbon dioxide causes peptide carbamylation during storage, forming carbamate adducts on lysine and N-terminal amino groups in unbuffered solutions.
Peptide Deamidation: Asparagine Succinimide Formation
Learn how reconstituted peptide deamidation occurs through asparagine succinimide intermediate formation, why Asn-Gly motifs degrade fastest, and storage strategies.
Peptide Glycation & Amadori Rearrangement in Storage
Learn how peptide glycation occurs through Maillard reactions with trace reducing sugars from lyoprotectant excipient degradation during reconstituted peptide storage.
Peptide Photolytic Disulfide Bond Homolysis & UV Storage
Learn how reconstituted peptide photolytic disulfide bond homolysis occurs through UV radiation in clear glass vials and how to prevent thiyl radical damage.
DKP Cyclization in Reconstituted Peptides: Causes & Prevention
Learn how N-terminal diketopiperazine (DKP) cyclization degrades reconstituted peptides through intramolecular aminolysis and how to prevent this storage issue.
Copper-Catalyzed Peptide Degradation in Reconstitution
Learn how trace copper ions from brass fittings cause oxidative peptide backbone cleavage through Fenton-like chemistry and how to protect reconstituted peptides.
Peptide Aspartate Isomerization During Storage Explained
Learn how reconstituted peptides undergo aspartate isomerization via succinimide intermediates at Asp-Gly and Asp-Ser motifs in acidic storage solutions.
Peptide Disulfide Bond Scrambling During Storage
Learn how peptide disulfide bond scrambling occurs during storage at alkaline pH through thiol-disulfide exchange cascades initiated by trace free thiols.