Predicted to enable CXCR3 chemokine receptor binding activity; chemokine activity; and heparin binding activity. Involved in antimicrobial humoral immune response mediated by antimicrobial peptide and defense response to protozoan. Located in collagen-containing extracellular matrix. Is expressed in several structures, including blood vessel; bone marrow; central nervous system; liver; and yolk sac. Orthologous to several human genes including PF4 (platelet factor 4). [provided by Alliance of Genome Resources, Apr 2022]