Purity ~99% (SDS-PAGE, HPLC). Human macrophage inflammatory protein-3 beta (MIP-3 beta, Exodus-3, ELC) is a member of the beta-chemokine (C-C) family of cytokines. It plays an important role in the inflammatory response of human T cells and tissue macrophages. Source: Recombinant protein corresponding to 77aa residues from human MIP-3 beta, expressed in E. coli. Molecular Weight: ~8.8kD Biological Activity: Determined by its ability to chemoattract human T cells using a concentration range of 10-50ng/ml. Endotoxin: <0.1ng/ug