Peptide Acylation From Polysorbate 80/20 Degradation
How polysorbate 80 and polysorbate 20 degradation products cause peptide acylation through reactive aldehydes, peroxides, and epoxides during reconstituted storage.
Category: Peptide Storage
Arginine Deimination in Reconstituted Peptides Explained
Learn how non-enzymatic arginine deimination converts arginine to citrulline in reconstituted peptides stored in alkaline solutions, affecting bioactivity.
Reconstituted Peptide Aggregation: Causes & Prevention
Learn how reconstituted peptide aggregation occurs through hydrophobic collapse, beta-sheet stacking, and nucleation pathways — and how to prevent potency loss.
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.
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.