Why Sealed-in-Peptides?

Why Sealed-in-Peptides^TM?

Sealed-in stability starts here.

Creating a vacuum around synthetic peptides leaves less room for the problems associated with moisture-based oxidation. Sealed-in-Peptides^TM is designed to help protect lyophilized peptide stability by sealing air out and stability in.

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Sealed-in-Peptides^TM helps protect peptides by:

Keeping peptides stable in a moisture-reduced environment
Helping prevent moisture-driven oxidation of lyophilized peptides
Reducing storage-related damage from air and delay-based exposure

Moisture and Air Matter

Oxidation of residues such as tryptophan, cysteine, and methionine can occur during storage or repeated thawing. Limiting air and moisture exposure helps reduce that risk.

Improved Storage Protection

Vacuum-sealed storage is intended to help preserve peptide stability for longer than conventional loose-storage approaches.

Supports Sensitive Sequences

Sequences containing oxidation-sensitive residues can particularly benefit from careful packaging and handling.

Useful Before Reconstitution

Lyophilized peptides are generally most stable before reconstitution, and protective packaging helps maintain that advantage.

Water and Air: Key Drivers of Oxidation

Protein and peptide microheterogeneity can arise from oxidation of residues such as tryptophan, cysteine, and methionine. This can decrease activity and stability, making oxidation a practical concern for both research use and quality-focused workflows.

Allow the peptide to come to room temperature, preferably in a desiccator, before reconstitution. This helps reduce condensation and moisture exposure during opening.

Practical Tips for Preventing Oxidation

Allow the peptide to reach room temperature before opening
For peptides containing Cys, Met, or Trp, use oxygen-free solvents when possible
Use sterile water or suitable buffer for solution preparation
Improve solubility by careful warming below 40°C or by sonication when needed
If pH must be increased, use only very weak bases to reduce side reactions and oxidation risk

When sealed storage becomes especially important

Sealed packaging is particularly useful when the peptide contains oxidation-sensitive residues or when long-term storage before reconstitution is expected.

Cys, Met, or Trp present: oxidation control matters more
Long storage period: minimize air and moisture exposure
Repeated handling expected: protect lyophilized material before use

Analyze your sequence to better understand oxidation-sensitive features: