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The table below compares storage conditions, expected shelf life, and degradation indicators for LL-37 in different states. Use this to assess whether your peptide is still viable or has been compromised. Lyophilised powder at −2…
−80°C (ultra-low freezer) 24+ months Not applicable Minimal. Oxidation nearly halted Gold standard for long-term storage; impractical for most labs −20°C (standard freezer) 12–18 months Not recommended (ice crystal formation) Low…
Oxidative Degradation Prolonged exposure to ambient temperature (>25°C for >24 hours) Yellow-to-brown discoloration, cloudiness No. Peptide bonds cleaved irreversibly Store at 2–8°C immediately after reconstitution; use within 28…
Lyophilised Powder Appearance Fine white/off-white crystals, loose texture Clumped, caked, or yellowed powder Clumping indicates moisture exposure and hydrolysis onset. Do not use Reconstitution Behavior Dissolves completely with…
Lyophilized, freezer −20°C to −80°C 12–24 months Minimal; slow oxidation of methionine residues Discoloration (yellowing), loss of vacuum seal Gold standard for long-term storage; verify temperature with data logger Lyophilized, …