Asparagine Deamidation in Stored Peptides Explained
Learn how asparagine deamidation via cyclic succinimide intermediates degrades reconstituted peptides during storage, causing 17 Da mass losses and isomerization.
Articles
Peptide Photolytic Degradation: Light Exposure Storage Guide
Learn how peptide photolytic degradation from light exposure damages reconstituted peptides through aromatic amino acid chromophores and how to prevent potency loss.
Peptide Metal Ion Chelation: Cu(II) & Zn(II) Storage
Learn how nanomolar Cu(II) and Zn(II) ions leached from vials and needles cause peptide chelation, conformational locking, and metal-bridged dimerization.
Peptide Disulfide Bond Scrambling During Storage
Learn how disulfide bond scrambling in multi-disulfide peptides occurs during storage via thiol-disulfide exchange reactions catalyzed by free thiol contaminants.
Peptide DKP Formation: N-Terminal Diketopiperazine Risk
Learn how N-terminal diketopiperazine (DKP) formation degrades reconstituted peptides through intramolecular cyclization, and which sequences like proline accelerate it.
Reconstituted Peptide Aggregation & Amyloid Fibril Formation
Learn how reconstituted peptide aggregation and amyloid-like fibril formation occur through nucleation-dependent polymerization during storage at elevated concentrations.
Peptide Aspartate Isomerization During Storage at pH 7
Learn how reconstituted peptides undergo aspartate isomerization via succinimide intermediates during storage, generating isoaspartate products that disrupt structure.
Peptide Beta-Elimination: Serine & Threonine Degradation
Learn how reconstituted peptides undergo serine and threonine beta-elimination in alkaline solutions, forming dehydroalanine and lanthionine crosslinks via E1cb mechanisms.
Peptide Histidine Oxidation & 2-Oxohistidine Formation
Learn how peptide histidine oxidation and 2-oxohistidine formation occur through metal-catalyzed Fenton reactions during reconstituted peptide storage.
Methionine Sulfoxidation in Reconstituted Peptides Guide
Learn how methionine sulfoxidation degrades reconstituted peptides through oxidation by dissolved oxygen, peroxide, and chloramine-T in storage water.