Exhibits antimicrobial activity against Gram-negative bacteria and Gram-positive bacteria. May act as a ligand for C-C chemokine receptor CCR6. Can bind to mouse (but not human) CCR6 and induce chemotactic activity of CCR6-expressing cells. DEFB4 Protein, Mouse, Recombinant (His & SUMO) is expressed in E. coli expression system with N-6xHis-SUMO tag. The predicted molecular weight is 20.6 kDa and the accession number is P82019.