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The best way to store peptides in long term

The best way is to store them in lyophilized form.

Lyophilized peptides (both regular peptides and KLH conjugated peptides) are more stable for long-term storage. The customer can store them in -20C for up to a year. 
We do not recommend long-term storage in solution.
If you would like to store the dissolved peptides, please store them in -20C to -80C and avoid freeze-thaw cycles.