Peptide Formaldehyde Crosslinking: Causes & Prevention
Learn how peptide formaldehyde-mediated hydroxymethylation and Schiff base crosslinking from rubber stoppers and PEG degradation affects peptide stability.
Category: Peptide Storage
Peptide Degradation via Fenton Redox Cycling in Ascorbic Acid
How copper and iron trace metals catalyze Fenton and Haber-Weiss redox cycling degradation of reconstituted peptides with ascorbic acid excipient from metal leaching.
Reconstituted Peptide Photodegradation: UV Light Risks
Reconstituted peptide photodegradation from UV and lab light causes tryptophan, tyrosine, and disulfide bond breakdown. Learn how to protect your peptides.
Peptide Acylation from Polysorbate Degradation Products
How polysorbate 80 and polysorbate 20 degradation products cause peptide acylation through nucleophilic attack by lysine, histidine, and N-terminal groups.
Reconstituted Peptide Aggregation: Causes & Prevention
Learn how reconstituted peptide aggregation through nucleation-dependent polymerization reduces bioactive peptide yield and how to prevent it during storage.
Peptide Aspartate Isomerization & Succinimide Degradation
Learn how reconstituted peptide aspartate isomerization via succinimide-mediated beta-aspartyl shift degrades stored peptides and how pH affects this pathway.
Peptide Beta-Elimination: Crosslink Formation in Storage
Learn how beta-elimination of serine, cysteine, and phosphoserine residues generates dehydroalanine intermediates causing lanthionine crosslinks in reconstituted peptides.
Asp-Pro Peptide Bond Cleavage in Reconstituted Peptides
Learn how Asp-Pro peptide bond cleavage occurs during storage via acid-catalyzed hydrolysis, cyclic anhydride intermediates, and prolyl nitrogen protonation.
Peptide Backbone Fragmentation via Hydroxyl Radicals
Learn how reconstituted peptides degrade through hydroxyl radical-mediated backbone fragmentation during storage in oxygenated solutions with trace metals.
Histidine Oxidation in Peptides: 2-Oxohistidine Formation
Learn how histidine residues in reconstituted peptides undergo metal-catalyzed oxidation to 2-oxohistidine via Fenton chemistry and how to prevent it.