The small chemotactic cytokine CCL4 (MIP-1 beta) is a chemoattractant for natural killer cells, monocytes and a variety of other immune cells. CCL4 is involved in several inflammatory and autoimmune diseases including viral infection such as HIV-1/AIDS. Human CCL4 Recombinant Protein is purified chemokine ligand 4 (CCL4, MIP-1 beta) produced in yeast.