CXCR4 ACTIVITY INHIBITING PEPTIDE AND APPLICATION THEREOF
Provided are a peptide and the like that can suppress or inhibit CXCR4 activity, and can suppress or inhibit the activity of both CXCL12 and CXCL14. The peptide and the like are: a dimer peptide resulting from dimerizing via a linker bond a peptide-or a variant peptide thereof-containing a region having the alpha-helix structure of the C-terminal side of a human CXCL14 chemokine protein
a derivative of the dimer peptide
or a salt of the dimer peptide or the derivative thereof.