CCL20 and neoplasm: The murine β-defensin Defb2, encoding peptide mBD2 is in a rodent-specific clade with physically adjacent genes Defb9, 10 and 11. Defb2 has been studied as a fusion peptide with a non-immunogenic tumour antigen and binds murine CCR6, similarly to inflammatory chemokine macrophage-inflammatory protein 3alpha (CCL20), and to chemoattract bone marrow-derived iDC, but not mature DC (mDC) 13.