LL-37 is a cationic antimicrobial peptide belonging to the cathelicidin family, the only human cathelicidin, widely studied in innate immunity and host-defense research. It is supplied as a high-purity white lyophilized powder, >=99% by HPLC, in sealed vials for laboratory use. LL-37 is investigated for its antimicrobial, immunomodulatory and wound-healing properties, and is commonly applied in cell-culture, infection and inflammation research. As a host-defense peptide with a defined sequence, it does not carry a single unified CAS number. The lyophilized presentation provides good stability and reproducible reconstitution for consistent dosing. Strict batch quality control is maintained and COA can be provided on request. For storage keep sealed at 2-8 degree C away from light and moisture. Trial and bulk orders are welcome with OEM and discreet packing available. For laboratory research use only, not for human or veterinary use.