LPS-induced CXC chemokine (LIX) is a member of the murine chemokine family. It is 132 amino acids (aa) in length with a predicted molecular weight of 14 kDa prior to cleavage of the N-terminal signal peptide (aa 1–40). LIX has no true human ortholog but is closely related to human CXCL5/ENA-78 and CXCL6/GCP-2. It is widely expressed, and is secreted by multiple cell types including fibroblasts, thymic epithelium, platelets, vascular endothelium, and hepatocytes. LIX acts as a proinflammatory chemokine and is chemotactic for neutrophils.