MOTS-c Storage: Temperature Is Everything
Lyophilized MOTS-c stored at -20°C in a frost-free freezer can maintain stability for 2+ years. The biggest enemy of peptide stability isn’t time — it’s temperature fluctuation and moisture exposure.
I’ve seen labs lose entire batches of expensive peptides because of improper storage. A $50 lab freezer failure can destroy thousands of dollars in research compounds. Here’s how to avoid that.
Storage Temperature Guide
- Short-term (days to weeks): 4°C refrigeration is acceptable for lyophilized powder
- Long-term (months to years): -20°C is the recommended standard
- Ultra-long-term: -80°C for maximum stability, especially for sensitive sequences
- After Reconstitution: Store at 4°C and use within the timeframe specified by the supplier
Reconstitution Best Practices
Always use sterile, bacteriostatic water or the solvent specified in your protocol for reconstituting MOTS-c. Tap water or non-sterile solvents introduce contaminants that degrade the peptide and compromise experimental results.
Key handling rules:
- Let the vial reach room temperature before opening to prevent condensation
- Use aseptic technique — work in a clean environment with sterile equipment
- Aliquot into single-use portions to avoid repeated freeze-thaw cycles
- Label everything with date of reconstitution and concentration
FAQ
How long does reconstituted MOTS-c last in the refrigerator?
Typically 2-4 weeks at 4°C, but this varies by peptide sequence and the solvent used for reconstitution. Always follow the supplier’s specific guidelines for your batch.
Can I freeze reconstituted peptide?
Some peptides tolerate freeze-thaw cycles better than others — MOTS-c is generally stable for 2-3 cycles, but avoid repeated freezing when possible. Aliquot into single-use portions to minimize freeze-thaw stress.
Proper storage is the difference between reliable research data and wasted resources. Invest in temperature monitoring.
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