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FKRIVQRIKDFLR

(Phe-Lys-Arg-Ile-Val-Gln-Arg-Ile-Lys-Asp-Phe-Leu-Arg) This peptide corresponds to LL-37(17-29), a bioactive cryptic peptide fragment of the antimicrobial peptide LL-37 (see: cathelicidins). The peptide has been shown to induce mast cell activation by activating the receptor MRGX2 [MAS-related GPR member X2; Mas-related G-protein-coupled receptor member X2].

For other proteins/peptides with functions in innate immunity and/or antimicrobial activities see also: Innate immunity and defense peptides Dictionary.

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